improve: performance

src/app/imprint/imprint.component.html

@@ -8,7 +8,7 @@
       </div>
       <div class="hero-actions">
         <a class="back-link" routerLink=""
-          ><fa-icon [icon]="faArrowLeft"></fa-icon><span>{{ content().imprint.backToPortfolio }}</span></a
+          ><app-icon [icon]="arrowLeftIcon"></app-icon><span>{{ content().imprint.backToPortfolio }}</span></a
         >
       </div>
     </div>