docs: add changelog

Author: BravoMike99

.github/CHANGELOG.md

@@ -161,6 +161,7 @@
 1. [EFB] Navigraph subscriptions other than Ultimate are now shown on the EFB to reduce confusion with "Unknown" - @tracernz (Mike)
 1. [A380X/FWS] Add RAT OUT, REFUEL PNL DOOR, HI ALT AIRPORT & REFUELING/DEFUELING memos - @BravoMike99 (bruno_pt99)
 1. [A380X/ND] Correct positioning of TCAS Messages and added TCAS STBY - @MrJigs7 (MrJigs)
+1. [A380X/MFD] Add speed limit modification on VERT REV SPD page
 
 ## 0.12.0