Bump docker/build-push-action from 6.10.0 to 6.13.0 (#130)

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -21,7 +21,7 @@ jobs:
           install: true
 
       - name: Build Docker image and store in cache
-        uses: docker/build-push-action@48aba3b46d1b1fec4febb7c5d0c644b249a11355
+        uses: docker/build-push-action@ca877d9245402d1537745e0e356eab47c3520991
         with:
           context: .
           push: false