build(deps): bump @liveblocks/client from 2.11.0 to 2.15.0

Bumps [@liveblocks/client](https://github.com/liveblocks/liveblocks/tree/HEAD/packages/liveblocks-client) from 2.11.0 to 2.15.0.
- [Release notes](https://github.com/liveblocks/liveblocks/releases)
- [Changelog](https://github.com/liveblocks/liveblocks/blob/main/CHANGELOG.md)
- [Commits](https://github.com/liveblocks/liveblocks/commits/v2.15.0/packages/liveblocks-client)

---
updated-dependencies:
- dependency-name: "@liveblocks/client"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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