Fix bug with referencing luau_lsp instead of lua_ls

[JZsmitty]

While there is indeed a luau_lsp listed under the server configuration in https://github.com/neovim/nvim-lspconfig/tree/master/lua/lspconfig/server_configurations , the configuration settings that are being applied are according to the suggestions for lua_ls and not luau_lsp.

I should note that I am not running your Neovim config but I noticed this when I was referencing it for my own use.

[omerxx]

Thank you!