Fix relative path

Author: fzaninotto

docs/_layouts/default.html

@@ -134,9 +134,9 @@
         </main>
 
         <script src="{{ '/js/materialize.min.js' | relative_url }}"></script>
-        <script src="js/ra-navigation.js"></script>
-        <script src="{{ 'js/prism.js' | relative_url }}"></script>
-        <script src="{{ 'js/ra-doc-exec.js' | relative_url }}" type="module" defer async></script>
+        <script src="{{ '/js/ra-navigation.js' | relative_url }}"></script>
+        <script src="{{ '/js/prism.js' | relative_url }}"></script>
+        <script src="{{ '/js/ra-doc-exec.js' | relative_url }}" type="module" defer async></script>
         <script
             src="https://cdnjs.cloudflare.com/ajax/libs/tocbot/4.12.0/tocbot.min.js"
             defer