Update documentation string for run_system_with_input

Co-authored-by: Trashtalk217 <[email protected]>

crates/bevy_ecs/src/system/system_registry.rs

@@ -232,7 +232,7 @@ impl World {
         self.run_system_with_input(id, ())
     }
 
-    /// Run a stored chained system by its [`SystemId`], providing an input value.
+    /// Run a stored system by its [`SystemId`], providing an input value through [`In`](crate::system::In).
     /// Before running a system, it must first be registered.
     /// The method [`World::register_system`] stores a given system and returns a [`SystemId`].
     ///