KBD67 MKII Notes Update (#7824)

* add readme to each of the mkii versions

* update the most parent of kbd67 readmes to have history of the new versions

* fix up the parent readme for the two types of boards

* Update keyboards/kbdfans/kbd67/mkiirgb/readme.md

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Update keyboards/kbdfans/kbd67/mkiirgb/readme.md

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Update keyboards/kbdfans/kbd67/mkiirgb/readme.md

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Update keyboards/kbdfans/kbd67/mkiirgb/readme.md

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* fixup readmes

Co-authored-by: fauxpark <fauxpark@gmail.com>

keyboards/kbdfans/kbd67/mkiirgb/readme.md

@@ -1,14 +1,19 @@
-# KBD67 Mk.II RGB
+# KBD67 Mk.II RGB (Hotswap)
 
 A customizable 65% RGB keyboard.
 
-Keyboard Maintainer: [moyi4681](https://github.com/moyi4681)  
-Hardware Supported: KBD67 Mk.II RGB  
-Hardware Availability: [kbdfans](https://kbdfans.myshopify.com/)
+* Keyboard Maintainer: [moyi4681](https://github.com/moyi4681)
+* Hardware Supported: KBD67 Mk.II RGB V1 and V2
+* Hardware Availability: [kbdfans](https://kbdfans.myshopify.com/)
 
+There are two versions of the KBD67 MKII RGB. Please use the appropriate firmware for your board. 
+
+* V1: STM32F303 (Arm), takes `.bin` files
+* V2: ATmega32U4 (AVR), takes `.hex` files
 
 Make example for this keyboard (after setting up your build environment):
 
-    make kbdfans/kbd67/mkiirgb:default
+    make kbdfans/kbd67/mkiirgb/v1:default # Arm (STM32F303)
+    make kbdfans/kbd67/mkiirgb/v2:default # AVR (ATmega32U4)
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).