Update Rust crate ruma to 0.12.1

Author: oxide-renovate[bot]

Cargo.toml

@@ -11,7 +11,7 @@ futures = "0.3.31"
 http = "1.2.0"
 matrix-sdk = { git = "https://github.com/matrix-org/matrix-rust-sdk.git", rev = "cbb92cacce1d16673a949204e4f88b78e9917026", default-features = false, features = ["rustls-tls"] }
 regex = "1.11.1"
-ruma = { version = "0.10.1", features = ["events"] }
+ruma = { version = "0.12.1", features = ["events"] }
 ruma-common = "0.13.0"
 serde = { version = "1.0.217", features = ["derive"] }
 thiserror = "2.0.9"