codeowners: Update for ruma-macros
* @jplatte
/crates/ruma-api-macros/ @ruma/macro-owners
/crates/ruma-common/ @iinuwa
-/crates/ruma-events-macros/ @ruma/macro-owners
/crates/ruma-federation-api/ @DevinR528
/crates/ruma-identifiers/ @iinuwa
-/crates/ruma-identifiers-macros/ @ruma/macro-owners
/crates/ruma-identifiers-validation/ @iinuwa
/crates/ruma-identity-service-api/ @iinuwa
+/crates/ruma-macros/ @ruma/macro-owners
/crates/ruma-serde-macros/ @ruma/macro-owners
/crates/ruma-signatures/ @gnieto
/crates/ruma-state-res/ @DevinR528
