checkout repo to allow action to run

Author: pdabelf5

.github/workflows/certify-ubi-image.yml

@@ -34,6 +34,9 @@ jobs:
     name: Certify OpenShift UBI images
     runs-on: ubuntu-24.04
     steps:
+      - name: Checkout
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
       - name: Certify UBI OSS images in quay
         uses: ./.github/actions/certify-openshift-image
         with: