Bump libgit2-sys from 0.16.1+1.7.1 to 0.16.2+1.7.2

Bumps [libgit2-sys](https://github.com/rust-lang/git2-rs) from 0.16.1+1.7.1 to 0.16.2+1.7.2.
- [Changelog](https://github.com/rust-lang/git2-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/git2-rs/commits)

---
updated-dependencies:
- dependency-name: libgit2-sys
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>