Update docker/build-push-action digest to 31ca4e5 (#29)

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

.github/workflows/release-image.yml

@@ -36,7 +36,7 @@ jobs:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@7e094594beda23fc8f21fa31049f4b203e51096b
+        uses: docker/build-push-action@31ca4e5d51253d7e4a2317bfe74699cbe3a398a9
         with:
           context: .
           push: true