Update docker/build-push-action digest to af5a7ed (#29)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/docker.yml

@@ -57,7 +57,7 @@ jobs:
       # https://github.com/docker/build-push-action
       - name: Build and push Docker image
         id: build-and-push
-        uses: docker/build-push-action@4a13e500e55cf31b7a5d59a38ab2040ab0f42f56 # v5
+        uses: docker/build-push-action@af5a7ed5ba88268d5278f7203fb52cd833f66d6e # v5
         with:
           context: .
           push: true