Fixes #8350 1. Summary https://www.figma.com/design/xt8O9mFeLl46C5InWwoMrN/Twenty?node-id=36424-125120&node-type=instance&t=psxuagFLo1Cu26Vz-0 Based on Figma, the menu header should have `base/medium` instead of `small/medium` when it's not clickable or dropdown. However, for dropdowns, we should keep it as `small/medium`. Menu items should stay as `base/regular`. 2. Solution Utilized `onClick` prop to decide the font size of the menu header. That way, Dropdowns stay as `base/small` while non-clickable headers are updated to `base/medium` 3. Screenshots ***please check out font size and weight for each case*** header:  menu item:  dropdown: 