Update .github/workflows/serverless-project.yml

Author: fr4nc1sc0-r4m0n

.github/workflows/serverless-project.yml

@@ -75,7 +75,7 @@ jobs:
           project-id: "elastic-observability-ci"
 
       - name: Set up Cloud SDK
-        uses: google-github-actions/setup-gcloud@26f734c2779b00b7dda794207734c511110a4368
+        uses: google-github-actions/setup-gcloud@26f734c2779b00b7dda794207734c511110a4368 # v3.0.0
 
       # TODO: as soon as the oblt-framework supports elastic-observability-ci we can avoid this step.
       # NOTE: