Legg på checkout-steg i publish pub/sub

.github/workflows/publish-message-pubsub.yml

@@ -33,6 +33,8 @@ jobs:
     name: Notify task completion to the onboarding PubSub-topic
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
       - name: Set vars
         id: set-output
         run: |