[Infra] Fix action name in 'health-metrics-release.yml' (#10703)

Author: ncooke3

.github/workflows/health-metrics-release.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v3
       - name: Set up Google Cloud SDK
-        uses: google-github-actions/setup-gcloud@master
+        uses: google-github-actions/setup-gcloud@main
       - name: Authenticate Google Cloud SDK
         run: |
           scripts/decrypt_gha_secret.sh \