Update dependency traefik to v2.8

This PR contains the following updates:

Package	Update	Change
traefik	minor	`v2.7` -> `v2.8`

Release Notes

containous/traefik

### [`v2.8`](https://togithub.com/containous/traefik/blob/HEAD/CHANGELOG.md#v280-rc1-httpsgithubcomtraefiktraefiktreev280-rc1-2022-06-13) [All Commits](https://togithub.com/traefik/traefik/compare/v2.7.0-rc1...v2.8.0-rc1) **Enhancements:** - **\[consul,consulcatalog]** Support multiple namespaces for Consul and ConsulCatalog providers ([#8979](https://togithub.com/traefik/traefik/pull/8979) by [rtribotte](https://togithub.com/rtribotte)) - **\[http3]** Upgrade quic-go to v0.27.0 ([#8922](https://togithub.com/traefik/traefik/pull/8922) by [tomMoulard](https://togithub.com/tomMoulard)) - **\[http3]** Upgrade quic-go to v0.26.0 ([#8874](https://togithub.com/traefik/traefik/pull/8874) by [sylr](https://togithub.com/sylr)) - **\[logs]** Add destination address to debug log ([#9032](https://togithub.com/traefik/traefik/pull/9032) by [qmloong](https://togithub.com/qmloong)) - **\[middleware,provider,tls]** Deprecate caOptional option in client TLS configuration ([#8960](https://togithub.com/traefik/traefik/pull/8960) by [kevinpollet](https://togithub.com/kevinpollet)) - **\[middleware]** Support URL replacement in errors middleware ([#8956](https://togithub.com/traefik/traefik/pull/8956) by [tomMoulard](https://togithub.com/tomMoulard)) - **\[middleware]** Allow config of additional CircuitBreaker params ([#8907](https://togithub.com/traefik/traefik/pull/8907) by [aidy](https://togithub.com/aidy)) - **\[provider]** Implement Traefik provider for Nomad orchestrator ([#9018](https://togithub.com/traefik/traefik/pull/9018) by [shoenig](https://togithub.com/shoenig)) - **\[server]** Allow HTTP/2 max concurrent stream configuration ([#8781](https://togithub.com/traefik/traefik/pull/8781) by [tomMoulard](https://togithub.com/tomMoulard)) - **\[tls,k8s/crd]** Support certificates configuration in TLSStore CRD ([#8976](https://togithub.com/traefik/traefik/pull/8976) by [kevinpollet](https://togithub.com/kevinpollet)) - **\[webui,pilot,hub]** Add Traefik Hub button and deprecate Pilot ([#9091](https://togithub.com/traefik/traefik/pull/9091) by [ldez](https://togithub.com/ldez)) - **\[webui,plugins]** Reach the catalog of plugins from the Traefik dashboard ([#9055](https://togithub.com/traefik/traefik/pull/9055) by [seedy](https://togithub.com/seedy)) **Misc:** - Merge current v2.7 into master ([#9095](https://togithub.com/traefik/traefik/pull/9095) by [rtribotte](https://togithub.com/rtribotte)) - Merge current v2.7 into master ([#9085](https://togithub.com/traefik/traefik/pull/9085) by [tomMoulard](https://togithub.com/tomMoulard)) - Merge current v2.7 into master ([#9060](https://togithub.com/traefik/traefik/pull/9060) by [rtribotte](https://togithub.com/rtribotte)) - Merge current v2.7 into master ([#9052](https://togithub.com/traefik/traefik/pull/9052) by [rtribotte](https://togithub.com/rtribotte)) - Merge current v2.7 into master ([#8959](https://togithub.com/traefik/traefik/pull/8959) by [tomMoulard](https://togithub.com/tomMoulard)) ### [`v2.8`](https://togithub.com/containous/traefik/blob/HEAD/CHANGELOG.md#v280-rc1-httpsgithubcomtraefiktraefiktreev280-rc1-2022-06-13) [All Commits](https://togithub.com/traefik/traefik/compare/v2.7.0-rc1...v2.8.0-rc1) **Enhancements:** - **\[consul,consulcatalog]** Support multiple namespaces for Consul and ConsulCatalog providers ([#8979](https://togithub.com/traefik/traefik/pull/8979) by [rtribotte](https://togithub.com/rtribotte)) - **\[http3]** Upgrade quic-go to v0.27.0 ([#8922](https://togithub.com/traefik/traefik/pull/8922) by [tomMoulard](https://togithub.com/tomMoulard)) - **\[http3]** Upgrade quic-go to v0.26.0 ([#8874](https://togithub.com/traefik/traefik/pull/8874) by [sylr](https://togithub.com/sylr)) - **\[logs]** Add destination address to debug log ([#9032](https://togithub.com/traefik/traefik/pull/9032) by [qmloong](https://togithub.com/qmloong)) - **\[middleware,provider,tls]** Deprecate caOptional option in client TLS configuration ([#8960](https://togithub.com/traefik/traefik/pull/8960) by [kevinpollet](https://togithub.com/kevinpollet)) - **\[middleware]** Support URL replacement in errors middleware ([#8956](https://togithub.com/traefik/traefik/pull/8956) by [tomMoulard](https://togithub.com/tomMoulard)) - **\[middleware]** Allow config of additional CircuitBreaker params ([#8907](https://togithub.com/traefik/traefik/pull/8907) by [aidy](https://togithub.com/aidy)) - **\[provider]** Implement Traefik provider for Nomad orchestrator ([#9018](https://togithub.com/traefik/traefik/pull/9018) by [shoenig](https://togithub.com/shoenig)) - **\[server]** Allow HTTP/2 max concurrent stream configuration ([#8781](https://togithub.com/traefik/traefik/pull/8781) by [tomMoulard](https://togithub.com/tomMoulard)) - **\[tls,k8s/crd]** Support certificates configuration in TLSStore CRD ([#8976](https://togithub.com/traefik/traefik/pull/8976) by [kevinpollet](https://togithub.com/kevinpollet)) - **\[webui,pilot,hub]** Add Traefik Hub button and deprecate Pilot ([#9091](https://togithub.com/traefik/traefik/pull/9091) by [ldez](https://togithub.com/ldez)) - **\[webui,plugins]** Reach the catalog of plugins from the Traefik dashboard ([#9055](https://togithub.com/traefik/traefik/pull/9055) by [seedy](https://togithub.com/seedy)) **Misc:** - Merge current v2.7 into master ([#9095](https://togithub.com/traefik/traefik/pull/9095) by [rtribotte](https://togithub.com/rtribotte)) - Merge current v2.7 into master ([#9085](https://togithub.com/traefik/traefik/pull/9085) by [tomMoulard](https://togithub.com/tomMoulard)) - Merge current v2.7 into master ([#9060](https://togithub.com/traefik/traefik/pull/9060) by [rtribotte](https://togithub.com/rtribotte)) - Merge current v2.7 into master ([#9052](https://togithub.com/traefik/traefik/pull/9052) by [rtribotte](https://togithub.com/rtribotte)) - Merge current v2.7 into master ([#8959](https://togithub.com/traefik/traefik/pull/8959) by [tomMoulard](https://togithub.com/tomMoulard))