fix(material-angular-io): add component selectors styling to API documentation

Author: mistrykaran91

material.angular.io/src/app/pages/component-viewer/component-api.scss

@@ -31,6 +31,7 @@
 .docs-api-method-description-cell,
 .docs-api-property-description,
 .docs-api-class-export-label,
+.docs-api-component-selectors,
 .docs-api-directive-selectors,
 .docs-api-class-description,
 .docs-api-class-export-name {