Bump upstream from 4855519 to 88678c0 (#94)

Bumps [upstream](https://github.com/bazelbuild/bazel) from `4855519` to `88678c0`.
- [Release notes](https://github.com/bazelbuild/bazel/releases)
- [Commits](bazelbuild/bazel@4855519...88678c0)

---
updated-dependencies:
- dependency-name: upstream
  dependency-version: 88678c00c46c16e026aaa966cbc923b3d9e4757c
  dependency-type: direct:production
...

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Author: dependabot[bot]