Breaking changes

#5519: Fix null YAML values being replaced by "null"

Features

#5551: Improve framework documentation

Bug fixes/performance improvements

#5489: Fix typo in merge2 #5621: Use require for Error and NoError #5622: Pin tool versions with hack/go.mod

Dependencies

#5555: chore: Update to Go v1.21 #5615: update dependencies google.golang.org/protobuf@v1.33.0