Bump git2 in /examples/host in the cargo group across 1 directory (#35)

Bumps the cargo group with 1 update in the /examples/host directory: [git2](https://github.com/rust-lang/git2-rs).


Updates `git2` from 0.20.2 to 0.20.4
- [Changelog](https://github.com/rust-lang/git2-rs/blob/git2-0.20.4/CHANGELOG.md)
- [Commits](rust-lang/git2-rs@git2-0.20.2...git2-0.20.4)

---
updated-dependencies:
- dependency-name: git2
  dependency-version: 0.20.4
  dependency-type: indirect
  dependency-group: cargo
...

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