fix: Adjusts lists items left marin on iOS (#2991)

Author: antsgar

packages/web/src/javascripts/Components/SuperEditor/Lexical/Theme/lists.scss

@@ -9,6 +9,9 @@
     --lexical-list-left-margin: 20px;
   }
 }
+.ios-web {
+  --lexical-list-left-margin: 24px;
+}
 .monospace-font {
   --lexical-list-left-margin: 42px;
 }