Update CHANGELOG.md

Author: arifBurakDemiray

ios/Classes/CountlyiOS/CHANGELOG.md

@@ -6,6 +6,7 @@
 
 * Mitigated an issue where visibility could have been wrongly assigned if a view was closed while going to background. (Experimental!)
 * Mitigated an issue where the user provided URLSessionConfiguration was not applied to direct requests
+* Mitigated an issue where a concurrent modification error could have happen when starting multiple stopped views
 * Mitigated an issue that parsing internal content event segmentation.
 
 ## 24.7.7