Update history.txt

Author: IllianiCBT

MekHQ/docs/history.txt

@@ -187,6 +187,7 @@ MEKHQ VERSION HISTORY:
 + PR #5562: Fixed Entrance Exam Logic and Added Tooltip Display
 + PR #5563: Log jvm parameters
 + PR #5565: Refactored StratCon Reinforcement Dialog & Added GM Reinforcement Option
++ PR #5566: Refactored Nag Dialog Checks to Improve Performance 
 
 0.50.01 (2024-11-10 1800 UTC)
 + PR #4810: Respecting Trademarks (Mech to Mek)