docs(neovim/vim): Update instruction for Coc

README.md

@@ -194,8 +194,15 @@ Install the `zls-vscode` extension from [here](https://github.com/zigtools/zls-v
 #### CoC
 
 - Install the CoC engine from [here](https://github.com/neoclide/coc.nvim).
-- Issue `:CocConfig` from within your Vim editor, and the following snippet:
 
+Then choose one of the following two ways
+
+1. Use extension
+
+    Run `:CocInstall coc-zls` to install [coc-zls](https://github.com/xiyaowong/coc-zls), 
+    this extension supports the same functionality as the VScode extension
+  
+2. Manually register
     ```json
     {
        "languageserver": {