Bump Common/Mu from a6cc881 to b5aefd3

Bumps [Common/Mu](https://github.com/microsoft/mu_plus) from `a6cc881` to `b5aefd3`.
- [Release notes](https://github.com/microsoft/mu_plus/releases)
- [Commits](microsoft/mu_plus@a6cc881...b5aefd3)

---
updated-dependencies:
- dependency-name: Common/Mu
  dependency-type: direct:production
...

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