docs: Fix typo in bracketedArray option name in README.md (#239)

https://github.com/npm/ini/blob/5cb0c9f453a190ee5a1d33c590945ca5bafd5fb5/lib/ini.js#L14


https://github.com/npm/ini/blob/5cb0c9f453a190ee5a1d33c590945ca5bafd5fb5/README.md?plain=1#L155

Author: futpib

README.md

@@ -152,7 +152,7 @@ stringify(object,{
      *  Some parsers treat duplicate names by themselves as arrays
      */
 
-    backetedArray : true
+    bracketedArray : true
 
 })
 ```