Update links to material library docs (#104392)

* Update links to `material` library docs

* outsmart bot heuristics

Author: guidezpl

packages/flutter/lib/material.dart

@@ -10,10 +10,14 @@
 ///
 /// See also:
 ///
-///  * [flutter.dev/widgets](https://flutter.dev/widgets/)
-///    for a catalog of commonly-used Flutter widgets.
+///  * [flutter.dev/widgets/material](https://flutter.dev/widgets/material)
+///    for a catalog of commonly-used Material component widgets.
 ///  * [material.io/design](https://material.io/design/)
 ///    for an introduction to Material Design.
+///  * [material.io/components](https://material.io/components?platform=flutter)
+///    for the Material 2 specification.
+///  * [m3.material.io](https://m3.material.io)
+///    for the Material 3 specification.
 library material;
 
 export 'src/material/about.dart';