fixup! refactor(material/button): switch outlined button to tokens API

Author: wagnermaciel

src/material/core/tokens/m2/mdc/_button-outlined.scss

@@ -4,7 +4,7 @@
 @use '../../../theming/inspection';
 
 // The prefix used to generate the fully qualified name for tokens in this file.
-$prefix: (mdc, button-protected);
+$prefix: (mdc, button-outlined);
 
 // Tokens that can't be configured through Angular Material's current theming API,
 // but may be in a future version of the theming API.