Add `className` and `key` attributes to Popular component   Add className `languages` to style the list   Add key `{lang}` to identify each language element with unique `key`
Add `className` and `key` attributes to Popular component
  Add className `languages` to style the list
  Add key `{lang}` to identify each language element with unique `key`

ryuzaki644/github-battle,ryuzaki644/github-battle