Update readme.md

Author: a-maurice

docs/readme.md

@@ -73,6 +73,10 @@ Release Notes
 -------------
 ### Upcoming
 - Changes
+    - General: Update to Firebase C++ SDK version 12.4.0.
+    - General (iOS): Update to Firebase Cocoapods version 11.4.2.
+    - General (Android): Update to Firebase Android BoM version 33.5.1.
+    - General (Android): Reduced minSdkVersion back to 23.
     - Analytics: Add support for Parameters of Lists of Dictionaries, needed
       by some events such as ViewCart.
       ([#1056](https://github.com/firebase/firebase-unity-sdk/issues/1056)).
@@ -81,6 +85,10 @@ Release Notes
       is considered deprecated, and will be removed in the future.
     - Analytics: Deprecated the Dispose functions, as they are no longer
       necessary for cleaning up memory.
+    - Auth (Android): Setting PhotoUrl to empty string or null with
+      UpdateUserProfile clears the field, making it consistent with the
+      other platforms.
+      ([#1112](https://github.com/firebase/firebase-unity-sdk/issues/1112)).
 
 ### 12.3.0
 - Changes