SDK-1151 update ChangeLog.md to indicate that iOS was also updated.

Author: echo-branch

ChangeLog.md

@@ -2,6 +2,7 @@ Branch Xamarin SDK change log
 
 - 8.0.0
   * Update to Branch Android SDK 5.1.3 
+  * Update to Branch iOS SDK 1.41.0
   * Bug fix for GAID. To enable GAID, add the "Xamarin.GooglePlayServices.Ads.Identifier" NuGet package. This is optional. The "117.0.1.5" release does not work on macOS. Use version "117.0.1.3" instead.
   * New dependency on "Xamarin.Android.Binding.InstallReferrer" NuGet package for install referrer. This is required.
   * Deprecated the "Debug" option. Use "EnableLogging = true;" for device side logs. Use Test Devices (https://help.branch.io/using-branch/docs/add-test-devices) to simulate installs.