gen_server: prefix public types with Gen (GenServerRef, GenServerCtx, GenServerName, GenServerBuilder, NamedGenServerBuilder)

src/scheduler.rs

@@ -206,7 +206,7 @@ pub fn spawn_under<A>(supervisor: Pid<A>, f: impl FnOnce() + Send + 'static) ->
 /// [`send_to`](crate::send_to) always resolves, never racing the body's first
 /// instruction. The actor is detached — its lifetime is governed by its own
 /// logic (an explicit stop message, or returning), like
-/// [`ServerBuilder::start`](crate::ServerBuilder::start) — so the backing join
+/// [`GenServerBuilder::start`](crate::GenServerBuilder::start) — so the backing join
 /// handle is dropped. Spawns under the current actor (via [`spawn`]).
 ///
 /// Panics if called outside `Runtime::run()`.