Fix jumping of toot date when clicking spoiler button (mastodon#11449)

* Fix jumping of toot date when clicking spoiler button

* Fix lint

Author: ariasuni

app/javascript/styles/mastodon/components.scss

@@ -731,7 +731,7 @@
     white-space: pre-wrap;
 
     &:last-child {
-      margin-bottom: 2px;
+      margin-bottom: 0;
     }
   }