info.json update to pk60 (#2961)

* Play Keyboard60 PCB

pk60 PCB files upload

* Add readme files for pk60

* error solving

* uneeded question marks removed

* Update readme.md

* Layouts update

Including ANSI, ISO, 2 kinds of arrows, minila and ALL layouts.

* info.json and redme.md fix

* uppercase fix to lowercase

keyboards/pk60/readme.md

@@ -2,7 +2,9 @@
 
 ![Play Keyboard60](https://i.imgur.com/3pvC6I4.png)
 
-A 60% keyboard PCB made and sold by Play Keyboard.
+A 60% keyboard PCB made by Play Keyboard.
+It supports GH60 layout and mutultiple layouts like arrows, 2u shift, minila, etc.
+Fitted with all stock GH60 cases, with WS2812 RGB underglow.
 
 Keyboard Maintainer: [Barry Huang](https://github.com/yj7272098)  
 Hardware Supported: Play Keyboard60