Bump connectedhomeip from 12d8487 to 5bb5c9e

Bumps [connectedhomeip](https://github.com/project-chip/connectedhomeip) from `12d8487` to `5bb5c9e`.
- [Commits](project-chip/connectedhomeip@12d8487...5bb5c9e)

Commit `5bb5c9e` happens to be the divergence point and the current
commit of the v1.3-branch.