Update docker/build-push-action action to v7

Author: renovate[bot]

.github/workflows/ci-pipeline.yml

@@ -68,7 +68,7 @@ jobs:
       # https://github.com/docker/build-push-action
       - name: Build test image
         id: build-test
-        uses: docker/build-push-action@v6.18.0
+        uses: docker/build-push-action@v7.0.0
         with:
           context: .
           load: true
@@ -165,7 +165,7 @@ jobs:
       # This build an image WITHOUT tags and outputs the digests, so that we can aggragate them later
       - name: Build and push production image
         id: build-and-push
-        uses: docker/build-push-action@v6.18.0
+        uses: docker/build-push-action@v7.0.0
         with:
           context: .
           target: ${{ matrix.docker_target }}