fix: user account menu ellipsis fixes (#34663)

Co-authored-by: r.sergeev <r.sergeev@yadro.com>

webapp/channels/src/components/user_account_menu/__snapshots__/user_account_name_menuitem.test.tsx.snap

@@ -21,11 +21,11 @@ exports[`UserAccountNameMenuItem should not break if no props are passed 1`] = `
     <div
       class="label-elements"
     >
-      <h2
+      <span
         class="userAccountMenu_nameMenuItem_primaryLabel"
       >
         @undefined
-      </h2>
+      </span>
     </div>
   </li>
 </div>

webapp/channels/src/components/user_account_menu/user_account_name_menuitem.tsx

@@ -53,9 +53,9 @@ export default function UserAccountNameMenuItem({profilePicture, ...rest}: Props
         const username = `@${currentUser?.username}`?.trim();
 
         return (
-            <h2 className='userAccountMenu_nameMenuItem_primaryLabel'>
+            <span className='userAccountMenu_nameMenuItem_primaryLabel'>
                 {username}
-            </h2>
+            </span>
         );
     }