Bump docker/build-push-action from 6.15.0 to 7.0.0 (#297)

Author: dependabot[bot]

.github/workflows/test.yml

@@ -22,7 +22,7 @@ jobs:
           install: true
 
       - name: Build Docker image and store in cache
-        uses: docker/build-push-action@471d1dc4e07e5cdedd4c2171150001c434f0b7a4
+        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294
         with:
           context: .
           push: false