Bump redhat-actions/push-to-registry from 2.5.1 to 2.6 (#333)

Bumps [redhat-actions/push-to-registry](https://github.com/redhat-actions/push-to-registry) from 2.5.1 to 2.6.
- [Release notes](https://github.com/redhat-actions/push-to-registry/releases)
- [Changelog](https://github.com/redhat-actions/push-to-registry/blob/main/CHANGELOG.md)
- [Commits](redhat-actions/push-to-registry@v2.5.1...v2.6)

---
updated-dependencies:
- dependency-name: redhat-actions/push-to-registry
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build-manylinux-container-images.yml

@@ -102,7 +102,7 @@ jobs:
             'refs/heads/{0}', github.event.repository.default_branch
         )
       id: push-to-ghcr
-      uses: redhat-actions/push-to-registry@v2.5.1
+      uses: redhat-actions/push-to-registry@v2.6
       with:
         image: ${{ steps.build-image.outputs.image }}
         tags: ${{ steps.build-image.outputs.tags }}