build(deps): Bump external/benchmark from 50ffd3e to 62a321d

Bumps [external/benchmark](https://github.com/google/benchmark) from `50ffd3e` to `62a321d`.
- [Release notes](https://github.com/google/benchmark/releases)
- [Commits](google/benchmark@50ffd3e...62a321d)

---
updated-dependencies:
- dependency-name: external/benchmark
  dependency-type: direct:production
...

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