Bump connectedhomeip from a97bad9 to 12d8487

Bumps [connectedhomeip](https://github.com/project-chip/connectedhomeip) from `a97bad9` to `12d8487`.
- [Release notes](https://github.com/project-chip/connectedhomeip/releases)
- [Commits](project-chip/connectedhomeip@a97bad9...12d8487)

---
updated-dependencies:
- dependency-name: connectedhomeip
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>