Bump git2 from 0.19.0 to 0.20.0

Bumps [git2](https://github.com/rust-lang/git2-rs) from 0.19.0 to 0.20.0.
- [Changelog](https://github.com/rust-lang/git2-rs/blob/master/CHANGELOG.md)
- [Commits](rust-lang/git2-rs@git2-0.19.0...git2-0.20.0)

---
updated-dependencies:
- dependency-name: git2
  dependency-version: 0.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -37,7 +37,7 @@ deno_runtime = { version = "0.177.0", optional = true }
 dialoguer = { version = "0.11.0", features = ["fuzzy-select"] }
 env_logger = "0.11.6"
 futures = "^0.3"
-git2 = { version = "0.19.0", default-features = false }
+git2 = { version = "0.20.0", default-features = false }
 git-version = "0.3.5"
 home = "0.5.3"
 ignore = { version = "0.4.20", optional = true }