[gruvbox-dark theme] Update colors
[gruvbox-dark theme] Update colors

The colors were off for certain words in c++ and Java so this is to correct those mistakes.
codio/CodeMirror,pabloferz/CodeMirror,nightwing/CodeMirror,SidPresse/CodeMirror,notepadqq/CodeMirror,thomasjm/CodeMirror,hackmdio/CodeMirror,hackmdio/CodeMirror,SidPresse/CodeMirror,thomasjm/CodeMirror,dperetti/CodeMirror,namin/CodeMirror,mtaran-google/CodeMirror,jkaplon/CodeMirror,nightwing/CodeMirror,thomasjm/CodeMirror,nightwing/CodeMirror,namin/CodeMirror,namin/CodeMirror,jkaplon/CodeMirror,wingify/CodeMirror,mtaran-google/CodeMirror,notepadqq/CodeMirror,jkaplon/CodeMirror,mtaran-google/CodeMirror,hackmdio/CodeMirror,dperetti/CodeMirror,wingify/CodeMirror,pabloferz/CodeMirror,codio/CodeMirror,notepadqq/CodeMirror,pabloferz/CodeMirror,codio/CodeMirror,SidPresse/CodeMirror,dperetti/CodeMirror,wingify/CodeMirror