Update licenses.ecr

Oh, it's handlers not helpers.

src/invidious/views/licenses.ecr

@@ -25,7 +25,7 @@
 
         <tr>
             <td>
-                <a href="/js/helpers.js?v=<%= ASSET_COMMIT %>">helpers.js</a>
+                <a href="/js/handlers.js?v=<%= ASSET_COMMIT %>">handlers.js</a>
             </td>
 
             <td>
@@ -33,7 +33,7 @@
             </td>
 
             <td>
-                <a href="/js/helpers.js?v=<%= ASSET_COMMIT %>"><%= translate(locale, "source") %></a>
+                <a href="/js/handlers.js?v=<%= ASSET_COMMIT %>"><%= translate(locale, "source") %></a>
             </td>
         </tr>