Merge pull request #1790 from kube-rs/dependabot/cargo/darling-0.21.0

Update darling requirement from 0.20.3 to 0.21.0

Author: clux

Cargo.toml

@@ -40,7 +40,7 @@ backon = "1.3"
 base64 = "0.22.1"
 bytes = "1.1.0"
 chrono = { version = "0.4.34", default-features = false }
-darling = "0.20.3"
+darling = "0.21.0"
 derive_more = "2.0.1"
 educe = { version = "0.6.0", default-features = false }
 either = "1.6.1"