Bump third_party/bouffalolab/repo from 31489e4 to dbca8b0

Bumps [third_party/bouffalolab/repo](https://github.com/bouffalolab/bl_iot_sdk_tiny) from `31489e4` to `dbca8b0`.
- [Commits](bouffalolab/bl_iot_sdk_tiny@31489e4...dbca8b0)

---
updated-dependencies:
- dependency-name: third_party/bouffalolab/repo
  dependency-type: direct:production
...

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