Bump golang from 1.21.5-bullseye to 1.21.6-bullseye in /cicd (#180)

Bumps golang from 1.21.5-bullseye to 1.21.6-bullseye.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

cicd/Dockerfile_goreleaser

@@ -1,5 +1,5 @@
 #syntax=docker/dockerfile-upstream:1.6
-FROM --platform=$BUILDPLATFORM golang:1.21.5-bullseye
+FROM --platform=$BUILDPLATFORM golang:1.21.6-bullseye
 
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