fix(docs): we've updated to Angular 18 on 18th of July

Author: mfranzke

showcases/patternhub/pages/foundations/playgrounds/index.mdx

@@ -27,10 +27,10 @@ We would also appreciate it if you could provide a working example when opening
     	</DBCard>
     </a>
 
-    <a href="https://codesandbox.io/s/github/db-ux-design-system/examples/tree/main/angular17-example">
+    <a href="https://codesandbox.io/s/github/db-ux-design-system/examples/tree/main/angular18-example">
     	<DBCard behavior="interactive">
     		![](/assets/images/angular-showcase.svg)
-    		<strong>Angular 17</strong>
+    		<strong>Angular 18</strong>
     		Angular app including `@db-ux/ngx-core-components`
     	</DBCard>
     </a>
@@ -65,10 +65,10 @@ We would also appreciate it if you could provide a working example when opening
     	</DBCard>
     </a>
 
-    <a href="https://stackblitz.com/fork/github/db-ux-design-system/examples/tree/main/angular17-example?file=index.html">
+    <a href="https://stackblitz.com/fork/github/db-ux-design-system/examples/tree/main/angular18-example?file=index.html">
     	<DBCard behavior="interactive">
     		![](/assets/images/angular-showcase.svg)
-    		<strong>Angular 17</strong>
+    		<strong>Angular 18</strong>
     		Angular app including `@db-ux/ngx-core-components`
     	</DBCard>
     </a>