Update index.mdx (#1752)

Charging specifications for updated models.

website/docs/03-faq/index.mdx

@@ -338,8 +338,8 @@ Onion keeps versioned backups of your play activity in case of such corruption:
 The left most LED on the top of the Mini will turn blue when a full charge is reached.
 The blue LED on the MMP is unfortunately non-functional, the red LED will turn off when fully charged.
 
-**MM:** Miyoo recommends 5V 1A and it must be USB-A to USB-C _(USB-C to USB-C charging is not supported)_.  
-**MMP:** Supports USB-C to USB-C charging (the support is limited, and some chargers will not be accepted / start charging)
+**MM v2:** Miyoo recommends 5V 1A and it must be USB-A to USB-C _(USB-C to USB-C charging is not supported)_.
+**MMP and MM v4:** Supports USB-C to USB-C charging (the support is limited, and some chargers will not be accepted / start charging)
 
 ![LED Indicators-500](https://user-images.githubusercontent.com/98862735/189775988-b6b4062d-f231-4351-9a79-6920498f1554.png)