Bump git2 from 0.14.4 to 0.16.0 (paritytech#13123)

Bumps [git2](https://github.com/rust-lang/git2-rs) from 0.14.4 to 0.16.0.
- [Release notes](https://github.com/rust-lang/git2-rs/releases)
- [Commits](rust-lang/git2-rs@0.14.4...git2-curl-0.16.0)

---
updated-dependencies:
- dependency-name: git2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

utils/frame/generate-bags/Cargo.toml

@@ -17,5 +17,5 @@ pallet-staking = { version = "4.0.0-dev", path = "../../../frame/staking" }
 
 # third party
 chrono = { version = "0.4.19" }
-git2 = { version = "0.14.2", default-features = false }
+git2 = { version = "0.16.0", default-features = false }
 num-format = "0.4.3"