Bump sources/meta-mono from d7e3ed9 to b0a6b6a

Bumps sources/meta-mono from `d7e3ed9` to `b0a6b6a`.

---
updated-dependencies:
- dependency-name: sources/meta-mono
  dependency-version: b0a6b6ab42e1e76c13281055fc859ec068fa1ed1
  dependency-type: direct:production
...

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Author: dependabot[bot]