deps: bump Golang version to 1.21.6

[updateclibot]

deps: update Golang Version

deps: update release workflow with Golang version to 1.21.6

change detected: * key "$.jobs.build.steps[3].with.go-version" updated from "1.21.5" to "1.21.6", in file ".github/workflows/release.yaml"

1.21.6

Golang changelog for version "1.21.6" is available on "https://go.dev/doc/devel/release#go1.21.minor"

deps: update build workflow with Golang version to 1.21.6

change detected: * key "$.jobs.build.steps[0].with.go-version" updated from "1.21.5" to "1.21.6", in file ".github/workflows/go.yaml"

1.21.6

Golang changelog for version "1.21.6" is available on "https://go.dev/doc/devel/release#go1.21.minor"

GitHub Action workflow link

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