Bump MU_BASECORE from 346e17b to 7711132 (#114)

Bumps [MU_BASECORE](https://github.com/microsoft/mu_basecore) from `346e17b` to `7711132`.
- [Release notes](https://github.com/microsoft/mu_basecore/releases)
- [Commits](microsoft/mu_basecore@346e17b...7711132)

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

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