🐛 Fix lang-toggle.js for live deploy

Author: karnkaul

guide/theme/lang_toggle.js

@@ -41,10 +41,13 @@
       if (idx === -1) {
         // Fallback: If "book/" isn’t in the path
         // Just go to the top-level file in the chosen language.
+        let newPath = '';
         if (chosenLang === 'en') 
-          window.location.href = 'index.html'; 
+          newPath = 'index.html'; 
         else 
-          window.location.href = chosenLang + '/index.html';
+          newPath = chosenLang + '/index.html';
+        
+        window.location.href = newPath;
 
         return;
       }