ci: Pin azure/aks-set-context to commit hash (#3543)

ci: Pin azure/aks-set-context to hash for v5.0.0

Author: tippmar-nr

.github/workflows/deploy-k8s-unboundedservices.yml

@@ -103,7 +103,7 @@ jobs:
           ./create_k8s_secrets.sh
       - name: Set AKS Context
         if: ${{ inputs.deploy_to_aks == true || inputs.restart_services == true }}
-        uses: azure/aks-set-context@v5
+        uses: azure/aks-set-context@60623acbdcbbdcf799ad50a1adf8703874339f8b # v5.0.0
         with:
           resource-group: ${{ env.RESOURCE_GROUP }}
           cluster-name: ${{ env.CLUSTER_NAME }}