Update history.txt

Author: rjhancock

MekHQ/docs/history.txt

@@ -33,7 +33,7 @@ MEKHQ VERSION HISTORY:
 + PR #6006: Added Shortcut Method to Check if a Unit is Battle Armor
 + Fix #6009: Improve Stratcon deployment logic to ensure units aren't deployed twice
 + PR #6012: Fixed Multiple Resupply Bugs
-
++ PR #6020: Manage Scenario will now use manage scenario and not manage forces 
 
 0.50.03 (2025-02-02 2030 UTC)
 + PR #5568: Spare parts rules reference adjustment