Update Rust crate k8s-openapi to 0.21.1

Author: renovate-bot

Cargo.toml

@@ -29,7 +29,7 @@ color-eyre = "0.6.3"
 dotenv = "0.15.0"
 eyre = "0.6.12"
 git2 = "0.18.3"
-k8s-openapi = { version = "0.20.0", features = ["v1_26"] }
+k8s-openapi = { version = "0.21.1", features = ["v1_26"] }
 kube = { version = "0.87.2", features = ["derive", "runtime"] }
 lettre = { version = "0.11.6", features = ["tokio1", "tracing", "tokio1-native-tls"] }
 mustache = "0.9.0"