fix(playground): fix links (#3295)

Author: fifoosid

packages/playground/_layouts/default.html

@@ -11,9 +11,9 @@
           <div class="heading">UI5 Web Components</div>
         </a>
         <div class="links-wrapper">
-          <a class="wrapper-links" href="{{ page.docs | absolute_url }}">Docs</a>
-          <a class="wrapper-links" href="{{ page.tutorials | absolute_url }}">Tutorials</a>
-          <a class="wrapper-links" href="{{ page.samples | absolute_url }}">Samples</a>
+          <a class="wrapper-links" href="{{ "/playground/docs" | absolute_url }}">Docs</a>
+          <a class="wrapper-links" href="{{ "/playground/tutorials" | absolute_url }}">Tutorials</a>
+          <a class="wrapper-links" href="{{ "/playground/components" | absolute_url }}">Samples</a>
         </div>
         <div class="search js-search">
           <div class="search-input-wrap">