fix: install snippets in README

Author: stipsan

README.md

@@ -9,10 +9,16 @@
 
 ## Installation
 
-```sh
-$ npm install mendoza
-// or
-$ yarn add mendoza
+```bash
+npm install mendoza
+```
+or
+```bash
+pnpm install mendoza
+```
+or
+```bash
+yarn add mendoza
 ```
 
 ## Usage