fix Builder::manage docs

core/tauri/src/app.rs

@@ -1207,14 +1207,19 @@ impl<R: Runtime> Builder<R> {
 
   /// Add `state` to the state managed by the application.
   ///
-  /// If the state for the `T` type has previously been set, the state is unchanged and false is returned. Otherwise true is returned.
+  /// This method can be called any number of times as long as each call
+  /// refers to a different `T`.
   ///
   /// Managed state can be retrieved by any command handler via the
   /// [`State`](crate::State) guard. In particular, if a value of type `T`
   /// is managed by Tauri, adding `State<T>` to the list of arguments in a
   /// command handler instructs Tauri to retrieve the managed value.
   /// Additionally, [`state`](crate::Manager#method.state) can be used to retrieve the value manually.
   ///
+  /// # Panics
+  ///
+  /// Panics if state of type `T` is already being managed.
+  ///
   /// # Mutability
   ///
   /// Since the managed state is global and must be [`Send`] + [`Sync`], mutations can only happen through interior mutability: