Fixed #14872 - Theming | Wrong Icon in documentation

src/app/showcase/doc/theming/builtinthemesdoc.ts

@@ -7,7 +7,7 @@ import { Code } from '../../domain/code';
         <app-docsectiontext>
             <p>
                 PrimeNG ships with various free themes to choose from. The list below states all the available themes in the npm distribution with import paths. For a live preview, use the configurator
-                <span class="border-round inline-flex border-1 w-2rem h-2rem p-0 align-items-center justify-content-center bg-primary"><span class="pi pi-cog"></span></span> at the topbar to switch themes.
+                <span class="border-round inline-flex border-1 w-2rem h-2rem p-0 align-items-center justify-content-center bg-primary"><span class="pi pi-palette"></span></span> at the topbar to switch themes.
             </p>
         </app-docsectiontext>
         <div class="h-20rem overflow-auto">