Release 6.8.0 cherry pick: conflicting Dynamic Links changelog changes. (#3790)

* Update FDL CHANGELOG (#3781)

* Issue number, not PR number (#3785)

Author: maksymmalyhin

Firebase/DynamicLinks/CHANGELOG.md

@@ -1,5 +1,5 @@
 # v4.0.4
-- [changed] Removed iOS 7 WebView code causing App Store complaints. (#3722)
+- [fixed] Removed references to UIWebView to comply with App Store Submission warning. (#3722)
 
 # v4.0.3
 - [added] Added support for custom domains for internal Google apps. (#3540)