Bump docker/build-push-action from 3 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 3 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v3...v6)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/code.yml

@@ -153,7 +153,7 @@ jobs:
         uses: docker/setup-buildx-action@v2
 
       - name: Build and export to Docker local cache
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v6
         with:
           # Note build-args, context, file, and target must all match between this
           # step and the later build-push-action, otherwise the second build-push-action
@@ -190,7 +190,7 @@ jobs:
 
       - name: Push cached image to container registry
         if: github.ref_type == 'tag' || github.ref_name == 'integration' || github.event_name == 'workflow_dispatch'
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v6
         # This does not build the image again, it will find the image in the
         # Docker cache and publish it
         with: