Update info_changelog.txt

Author: Bitl

game/quiver/info_changelog.txt

@@ -79,6 +79,7 @@ Added the following Source SDK Pull Requests:
 	- #1514: Crusader's Crossbow arrow healing is now affected by mult_health_fromhealers (used by Back Scratcher)
 	- #1515: Add "ParticleEffectStopAndDestroy" Client Effect and "DestroyImmediately" Input for info_particle_system
 	- #1516: Fix not being able to toggle off the orthographic camera
+	- #1517: Implement tf_stats_bogus covnvars to allow High stat tracking in modes with Increased Stats. I.E MvM
 
 Details:
 - Fixed a bug where the mini-crit damage effect doesn't show up when your shield breaks.