Bug 1577939 - [Protections Panel] Fix typo in selector that sets --height-offset. r=lina,Mardak

Differential Revision: https://phabricator.services.mozilla.com/D44291

--HG--
extra : moz-landing-system : lando

browser/themes/shared/controlcenter/panel.inc.css

@@ -25,7 +25,7 @@
   --popup-width: 32rem;
 }
 
-#protections-popoup[infoMessageShowing] {
+#protections-popup[infoMessageShowing] {
   --height-offset: 260px;
 }