Merge release v0.20.0

I've noticed some memory and goroutine buildup, linked to that function.

It seems like when the context get cancelled, the consumer could be gone, but that function would still attempt to write in the channel and block forever.

https://github.com/ipfs/gateway-conformance/releases/tag/v0.6.0

* fix(routing/http/contentrouter): return error when no responses are found in FindPeer
* fix(routing/http/contentrouter): fix findpeer iteration log message
* fix(routing/http/contentrouter): only return information for FindPeer that matches the requested peerID
* fix(routing/http/contentrouter): only return information for FindPeer if there are actual addresses
* fix(routing/http/contentrouter): switch logging from Warnw -> Warnf where there aren't key pairs
* docs: update CHANGELOG.md

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Co-authored-by: Marcin Rataj <lidel@lidel.org>

go get -t -u ./...