chore(deps): update docker/build-push-action action to v7

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

Author: renovate[bot]

.github/workflows/release.yml

@@ -34,7 +34,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Docker build
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           # Without this the .git directory is not present and our tests fail
           build-args: BUILDKIT_CONTEXT_KEEP_GIT_DIR=true