Bump upstream from bed7a1f to 515083c (#118)

Bumps [upstream](https://github.com/bazelbuild/bazel) from `bed7a1f` to `515083c`.
- [Release notes](https://github.com/bazelbuild/bazel/releases)
- [Commits](bazelbuild/bazel@bed7a1f...515083c)

---
updated-dependencies:
- dependency-name: upstream
  dependency-version: 515083c24a227f69a0d383d8ad35f8a46102197a
  dependency-type: direct:production
...

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Author: dependabot[bot]