deps: bump git2 from 0.10 to 0.11

Author: matthiaskrgr

Cargo.toml

@@ -38,7 +38,7 @@ clippy_lints = { version = "0.0.212", path = "clippy_lints" }
 regex = "1"
 semver = "0.9"
 rustc_tools_util = { version = "0.2.0", path = "rustc_tools_util"}
-git2 = { version = "0.10", optional = true }
+git2 = { version = "0.11", optional = true }
 tempfile = { version = "3.1.0", optional = true }
 lazy_static = "1.0"