fix doc-listing-inject error

Author: mwcz

scripts/doc-listing-inject.js

@@ -21,8 +21,8 @@ elementNames.forEach(
     (markup += `\n\t\t\t\t\t<li><a href="../elements/${element}/demo">${element}</a></li>`)
 );
 
-const wrapper = path.join(__dirname, "../doc/wrapper.html");
-const index = path.join(__dirname, "../doc/index.html");
+const wrapper = path.join(__dirname, "../examples/wrapper.html");
+const index = path.join(__dirname, "../examples/index.html");
 
 // Read in the wrapper template
 fs.readFile(wrapper, (err, data) => {