Enforce import order with ESLint (#25096)

app/javascript/mastodon/reducers/media_attachments.js

@@ -1,6 +1,7 @@
-import { STORE_HYDRATE } from '../actions/store';
 import { Map as ImmutableMap } from 'immutable';
 
+import { STORE_HYDRATE } from '../actions/store';
+
 const initialState = ImmutableMap({
   accept_content_types: [],
 });