chore(deps): upgrade jenkins-x/jx3-pipeline-catalog to version 0.6.8

[jenkins-x-bot-test]

from: https://github.com/jenkins-x-plugins/jx-promote

[jenkins-x-bot]

failed to trigger Pull Request pipeline

• failed to create agent
• failed to calculate in repo config
• failed to load trigger config for repository jenkins-x/jx for ref
• failed to create repo client
• error creating a clone
• exit status 128 Cloning into '/var/tmp/gitrepo389953563'... error
• RPC failed; curl 92 HTTP/2 stream 5 was not closed cleanly
• CANCEL (err 8) error
• 2577 bytes of body are still expected fetch-pack
• unexpected disconnect while reading sideband packet fatal
• early EOF fatal
• fetch-pack
• invalid index-pack output

[jenkins-x-bot]

[jx-info] Hi, we've detected that the pipelines in this repository are using a syntax that will soon be deprecated. We'll continue to update you through PRs as we progress. Please check #8589 for further information.