m134 readme update (#801)

* m134 readme update

* add more release notes

---------

Co-authored-by: Cynthia Jiang <[email protected]>

Author: cynthiajoan

docs/readme.md

@@ -71,12 +71,24 @@ Support
 
 Release Notes
 -------------
-### Upcoming Release
+### 11.3.0
 - Changes
+    - General: Update to Firebase C++ SDK version 11.3.0.
+    - General (Android): Update to Firebase Android BoM version 32.2.0.
+    - General (iOS): Update to Firebase Cocoapods version 10.12.0.
+    - General (Desktop): Fixed an error loading google-services.json and
+      google-services-desktop.json from paths with international characters on
+      Windows.
+    - Auth (Android): Fixed an issue where VerifyPhoneNumber's internal builder
+      failed to create PhoneAuthOptions with certain compiler settings.
+    - Auth (iOS): Fixed an issue where functions that return AuthResult were not
+      including updated credentials when encountering errors.
     - Firestore (Android) Fix the intermittent global references exhaustion
       crash when working with documents with a large number of keys and/or large
       map and/or array fields.
       ([#1364](https://github.com/firebase/firebase-cpp-sdk/pull/1364)).
+    - Remote Config (Desktop): Additional fix for handling of non-English time
+      zone names on Windows.
 
 ### 11.2.0
 - Changes