Enforce trailing comma in JS on multiline (#30002)

To keep blame info accurate and to avoid [changes like
this](https://github.com/go-gitea/gitea/pull/29977/files#diff-c3422631a14edbe1e508c4b22f0c718db318be08a6e889427802f9b6165d88d6R359),
it's good to always have a trailing comma, so let's enforce it in JS.

This rule is completely automatically fixable with `make lint-js-fix`
and that's what I did here.

web_src/js/features/tribute.js

@@ -25,7 +25,7 @@ function makeCollections({mentions, emoji}) {
       },
       menuItemTemplate: (item) => {
         return `<div class="tribute-item">${emojiHTML(item.original)}<span>${htmlEscape(item.original)}</span></div>`;
-      }
+      },
     });
   }
 
@@ -41,7 +41,7 @@ function makeCollections({mentions, emoji}) {
             ${item.original.fullname && item.original.fullname !== '' ? `<span class="fullname">${htmlEscape(item.original.fullname)}</span>` : ''}
           </div>
         `;
-      }
+      },
     });
   }