fix(material/button): fix outlined button line-height

Author: wagnermaciel

src/material/button/_button-theme.scss

@@ -171,6 +171,7 @@
 
   .mat-mdc-button,
   .mat-mdc-raised-button,
+  .mat-mdc-outlined-button,
   .mat-mdc-unelevated-button {
     line-height: inherit;
   }