Fix: Improve Markdownlint installation instructions

Clarified the installation process for Markdownlint, making it easier to follow and addressing potential issues with `nvm` and `zsh`.

README.md

@@ -142,14 +142,15 @@ If your note begins with "#", it will automatically be marked as Markdown format
 > Default auto enable Markdown auto formatting. You can disable it in the settings file: `markdown: {"formatting": false}`
 
 Before using this plug-in, you must ensure that [markdownlint][CLI] is installed on your system. To install `markdownlint`, do the following:
-    * If you use HomeBrew: `brew install markdownlint-cli`
-    * Other method:
-        1. Install [Node.js](http://nodejs.org).
-        2. Install `markdownlint` by typing the following in a terminal: `npm install -g markdownlint-cli`
-        3. If you are using `nvm` and `zsh`, ensure that the line to load `nvm` is in
-           `.zshenv` and not `.zshrc`.
-        4. If you are using `zsh` and `oh-my-zsh`, do not load the `nvm` plug-in for
-           `oh-my-zsh`.
+
+* If you use HomeBrew: `brew install markdownlint-cli`.
+* Other method:
+    1. Install [Node.js](http://nodejs.org).
+    2. Install `markdownlint` by typing the following in a terminal: `npm install -g markdownlint-cli`
+    3. If you are using `nvm` and `zsh`, ensure that the line to load `nvm` is in
+        `.zshenv` and not `.zshrc`.
+    4. If you are using `zsh` and `oh-my-zsh`, do not load the `nvm` plug-in for
+        `oh-my-zsh`.
 
 **Markdownlint Configuration Files**