Fix typo and changed double quotes to single quotes for consistency (#274)

* Fix typo

* Changed double quote to single quote 

For consistency.

README.md

@@ -42,17 +42,17 @@ Also Run `TSInstall go` to install the go parser if not installed yet.
 ### [vim-plug](https://github.com/junegunn/vim-plug)
 
 ```vim
-Plug "nvim-treesitter/nvim-treesitter"
+Plug 'nvim-treesitter/nvim-treesitter'
 Plug 'neovim/nvim-lspconfig'
 Plug 'ray-x/go.nvim'
-Plug 'ray-x/guihua.lua' ; recommanded if need floating window support
+Plug 'ray-x/guihua.lua' ; recommended if need floating window support
 ```
 
 ### [packer.nvim](https://github.com/wbthomason/packer.nvim)
 
 ```lua
 use 'ray-x/go.nvim'
-use 'ray-x/guihua.lua' -- recommanded if need floating window support
+use 'ray-x/guihua.lua' -- recommended if need floating window support
 use 'neovim/nvim-lspconfig'
 use 'nvim-treesitter/nvim-treesitter'
 ```