chore: Use serde derive feature to enable derive macro

Signed-off-by: Techassi <git@techassi.dev>

Author: Techassi

kube-derive/Cargo.toml

@@ -18,7 +18,7 @@ workspace = true
 proc-macro2.workspace = true
 quote.workspace = true
 syn = { workspace = true, features = ["extra-traits"] }
-serde.workspace = true
+serde = { workspace = true, features = ["derive"] }
 serde_json.workspace = true
 darling.workspace = true