Update go deps

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/pion/webrtc/v3	require	patch	v3.1.55 -> v3.1.56
github.com/stretchr/testify	require	patch	v1.8.1 -> v1.8.2

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Release Notes

pion/webrtc

### [`v3.1.56`](https://togithub.com/pion/webrtc/releases/tag/v3.1.56) [Compare Source](https://togithub.com/pion/webrtc/compare/v3.1.55...v3.1.56) #### Changelog - [`61f69be`](https://togithub.com/pion/webrtc/commit/61f69be) Update module github.com/pion/ice/v2 to v2.3.1 - [`132ebfa`](https://togithub.com/pion/webrtc/commit/132ebfa) Update module github.com/pion/dtls/v2 to v2.2.6 - [`d4fc945`](https://togithub.com/pion/webrtc/commit/d4fc945) Update module github.com/pion/dtls/v2 to v2.2.5 - [`fba48cd`](https://togithub.com/pion/webrtc/commit/fba48cd) Add Mermaid Chart to examples/data-channels

stretchr/testify

### [`v1.8.2`](https://togithub.com/stretchr/testify/compare/v1.8.1...v1.8.2) [Compare Source](https://togithub.com/stretchr/testify/compare/v1.8.1...v1.8.2)

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