Update docker/build-push-action digest to 31ca4e5

Author: renovate[bot]

.github/workflows/container.yaml

@@ -53,7 +53,7 @@ jobs:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        uses: docker/build-push-action@31ca4e5d51253d7e4a2317bfe74699cbe3a398a9
         with:
           context: .
           push: true