Update Rust crate serde to 1.0.228 (#304)

Co-authored-by: oxide-renovate[bot] <146848827+oxide-renovate[bot]@users.noreply.github.com>

Author: oxide-renovate[bot]

Cargo.toml

@@ -38,7 +38,7 @@ reqwest = { version = "0.12.23", default-features = false, features = ["json", "
 rsa = "0.9.8"
 schemars = { version = "0.8.22", features = ["url"] }
 secrecy = "0.10.3"
-serde = "1.0.219"
+serde = "1.0.228"
 serde_json = "1"
 serde_urlencoded = "0.7.1"
 sha2 = "0.10.9"