chore(deps): bump google/cloud-sdk from 475.0.0-alpine to 476.0.0-alp…

…ine in /support (#6055)

---
updated-dependencies:
- dependency-name: google/cloud-sdk
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

support/alpine.Dockerfile

@@ -100,7 +100,7 @@ COPY --chown=$USER:root --from=aws-builder /usr/bin/aws-iam-authenticator /usr/b
 #
 # gcloud base
 #
-FROM google/cloud-sdk:475.0.0-alpine@sha256:c5ba7ebe95716d3ab4b6c8de2832e48c2ecc36de800deb7879438c347c4ebd38 as gcloud-base
+FROM google/cloud-sdk:476.0.0-alpine@sha256:b8eb3ce87c36ed3a529fc1c957bc023bdb3392c4ad6d9007ebf7f58cca828c85 as gcloud-base
 
 RUN gcloud components install kubectl gke-gcloud-auth-plugin --quiet