update changelog for messaging and iid (#5782)

Firebase/InstanceID/CHANGELOG.md

@@ -1,3 +1,6 @@
+# 2020-06 -- 4.4.0
+- [changed] Standardize FirebaseCore import headers. (#5758)
+
 # 2020-04 -- 4.3.4
 - [changed] Internal cleanup and remove repetitive local notification. (#5339)
 

FirebaseMessaging/CHANGELOG.md

@@ -1,4 +1,4 @@
-# unreleased
+# 2020-06 -- v4.5.0
 - [changed] Use UNNotificationRequest to schedule local notification for local timezone notification for iOS 10 and above. This should also fix the issue that '%' was not properly shown in title and body. (#5667)
 - [fixed] Fixed Maltese language key for language targeting. (#5702)