Fix styling typo

Author: Ives van Hoorne

src/app/pages/Sandbox/Editor/Content/Header/Action.js

@@ -74,7 +74,7 @@ const ActionTooltip = styled(Tooltip)`
 
 const IconContainer = styled.div`
   display: flex;
-  alignItems: center;
+  align-items: center;
   height: 100%;
   padding: 0 .75rem;
 `;