fix toml features

Author: kanarus

ohkami_macros/Cargo.toml

@@ -22,7 +22,7 @@ features      = ["worker", "openapi"]
 proc-macro2  = "1.0"
 quote        = "1.0"
 syn          = { version = "2.0", features = ["full"] }
-toml         = { optional = true, version = "0.9",  features = ["parse"], default-features = false }
+toml         = { optional = true, version = "0.9",  features = ["serde", "parse"], default-features = false }
 jsonc-parser = { optional = true, version = "0.26", features = ["serde"] }
 serde        = { optional = true, workspace = true }
 serde_json   = { optional = true, workspace = true }