Update index.html

Fix indentation (to test the release process 🤫).

index.html

@@ -89,7 +89,7 @@ <h2>Autofill</h2>
 	<li><a href="./autofill/modal.html">Email autofill form within self-closing modal</a></li>
 	<li><a href="./autofill/form-submission.html">Form submission detection and autofill</a></li>
 	<li><a href="./autofill/frame-form-submission-parent.html">Form submission detection and autofill within an iframe</a></li>
-  <li>
+	<li>
 		Autoprompt credentials autofill when a login form is front and center
 		<ul>
 			<li><a href="./autofill/autoprompt/1-standard-login-form.html">Form present on pageload</a></li>