meta-*: bump poky from b8f8125 to 7bb9c22 in the layers group

Bumps the layers group with 1 update: poky.


Updates `poky` from `b8f8125` to `7bb9c22`

---
updated-dependencies:
- dependency-name: poky
  dependency-version: 7bb9c2255b3aed8441fba1133f350b223a3b6379
  dependency-type: direct:production
  dependency-group: layers
...

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

Author: dependabot[bot]