Fix language identifier.
Using [`vim-plug`](https://github.com/junegunn/vim-plug):
-```vimscript
+```vim
Plug 'autozimu/LanguageClient-neovim'
Plug 'junegunn/fzf.vim' " Optional dependency for symbol selection
Plug 'Shougo/deoplete.nvim' " Optional dependency for completion
@@ -15,7 +15,7 @@ Plug 'Shougo/deoplete.nvim' " Optional dependency for completion
Example configuration
-```vimscript
+```vim
let g:LanguageClient_serverCommands = {
\ 'rust': ['cargo', 'run', '--manifest-path=/opt/rls/Cargo.toml'],
\ }
