Update Rust crate git2 to 0.18.3

Author: renovate-bot

Cargo.lock

@@ -28,7 +28,7 @@ chrono = "0.4.35"
 color-eyre = "0.6.3"
 dotenv = "0.15.0"
 eyre = "0.6.12"
-git2 = "0.18.2"
+git2 = "0.18.3"
 k8s-openapi = { version = "0.20.0", features = ["v1_26"] }
 kube = { version = "0.87.2", features = ["derive", "runtime"] }
 lettre = { version = "0.11.4", features = ["tokio1", "tracing", "tokio1-native-tls"] }