Merge pull request #529 from T0mstone/main

Add MX Master 4 to TESTED.md

Author: PixlOne

TESTED.md

@@ -6,6 +6,7 @@ This is not by any means an exhaustive list. Many more devices are supported but
 | Device              | Compatible? |              Config Name               |
 | :-----------------: | :---------: | :------------------------------------: |
 | LIFT                |     Yes     | `LIFT VERTICAL ERGONOMIC MOUSE`        |
+| MX Master 4         |     Yes     | `MX Master 4`                          |
 | MX Master 3S        |     Yes     | `MX Master 3S`                         |
 | MX Master 3         |     Yes     | `Wireless Mouse MX Master 3`           |
 | MX Master 3 for Mac |     Yes     | `MX Master 3 for Mac`                  |