Update docker/build-push-action digest to af5a7ed

Author: renovate[bot]

.github/workflows/pull-request.yaml

@@ -15,7 +15,7 @@ jobs:
         uses: docker/setup-buildx-action@0d103c3126aa41d772a8362f6aa67afac040f80c # v3
 
       - name: Build container image
-        uses: docker/build-push-action@4a13e500e55cf31b7a5d59a38ab2040ab0f42f56 # v5
+        uses: docker/build-push-action@af5a7ed5ba88268d5278f7203fb52cd833f66d6e # v5
         with:
           context: .
           file: Dockerfile