Bug 1702124 - [devtools] Fix the checkbox cut by the image near it issue. r=Honza

Depends on D110659

Differential Revision: https://phabricator.services.mozilla.com/D111055

devtools/startup/aboutdevtools/subscribe.css

@@ -77,7 +77,7 @@
   width: 20px;
   height: 20px;
   margin-top: 2px;
-  margin-inline-end: 10px;
+  margin-inline: 5px 10px;
   flex-shrink: 0;
 }