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.

(cherry picked from commit 3d751b6ec18e57698ce86b79866031d2c80c2071)

Conflicts:
	web_src/js/components/DashboardRepoList.vue
	trivial context conflict because of '3b7b899afa fix commit_status'

web_src/js/components/ActivityHeatmap.vue

@@ -11,7 +11,7 @@ export default {
     locale: {
       type: Object,
       default: () => {},
-    }
+    },
   },
   data: () => ({
     colorRange: [
@@ -49,7 +49,7 @@ export default {
 
       const newSearch = params.toString();
       window.location.search = newSearch.length ? `?${newSearch}` : '';
-    }
+    },
   },
 };
 </script>