Update index.md

Author: NetrunnerCodex

docs/advanced/index.md

@@ -23,7 +23,7 @@ This section describes many of the game’s advanced concepts.
 
 <div class="nav-buttons">
   <!-- Previous Button -->
-  <a href="/docs/introduction/run-example" class="nav-button" aria-label="Previous page">
+  <a href="/docs/introduction/run_example" class="nav-button" aria-label="Previous page">
     <div class="nav-item">
       <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" viewBox="0 0 50 50">
         <path d="M30 20L20 30L30 40" />