pin setup go action commit

Author: tmonty12

.github/workflows/container-validation-backends.yml

@@ -77,7 +77,7 @@ jobs:
           docker build --target tester --progress=plain --build-arg DOCKER_PROXY=${ECR_HOSTNAME}/dockerhub/ .
 
       - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
         with:
           go-version: '1.24'
       - name: Check for uncommitted changes