chore(cdk-demo): fixed npm package name

Author: hakimio

apps/cdk-demo/src/app.component.html

@@ -14,7 +14,7 @@
                 routerLink="/"
                 class="logo-title"
             >
-                angular-ru/cdk
+                @angular-ru/cdk
             </a>
         </mat-toolbar>