Tweak changelog message to cover additional symptom due to util::WrapNSStringNoCopy() issue which @wilhuff is going to create a fix for.

Author: Michael Lehenbauer

Firestore/CHANGELOG.md

@@ -2,10 +2,10 @@
 
 # v0.10.3
 - [fixed] Fixed a regression in the 4.10.0 Firebase iOS SDK release that
-  prevented the SDK from communicating with the backend until successfully
-  authenticating via Firebase Authentication. All reads and writes would
-  silently be executed only locally rather than being sent as unauthenticated
-  requests.
+  prevented the SDK from communicating with the backend before successfully
+  authenticating via Firebase Authentication or after unauthenticating and
+  re-authenticating. Reads and writes would silently be executed locally
+  but not sent to the backend.
 
 # v0.10.2
 - [changed] When you delete a FirebaseApp, the associated Firestore instances