[google_maps_flutter] Fix typo and remove duplicitous CHANGELOG entry (flutter#8754)

Two issues caught by @jokerttu after flutter#8560 was already merged:

- a typo ("iOS-specific" --> "web-specific")
- a forgotten changelog entry

Author: filiph

packages/google_maps_flutter/google_maps_flutter/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.12.1
+
+* Fixes typo in README.
+
 ## 2.12.0
 
 * Adds support for animating the camera with a duration.

packages/google_maps_flutter/google_maps_flutter/README.md

@@ -103,7 +103,7 @@ For more details, see [Getting started with Google Maps Platform](https://develo
    <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY"></script>
    ```
 
-2. Read about iOS-specific features and limitations in the
+2. Read about web-specific features and limitations in the
    [`google_maps_flutter_web` README](https://pub.dev/packages/google_maps_flutter_web).
 
 ### All

packages/google_maps_flutter/google_maps_flutter/pubspec.yaml

@@ -2,7 +2,7 @@ name: google_maps_flutter
 description: A Flutter plugin for integrating Google Maps in iOS and Android applications.
 repository: https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/google_maps_flutter
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+maps%22
-version: 2.12.0
+version: 2.12.1
 
 environment:
   sdk: ^3.6.0

packages/google_maps_flutter/google_maps_flutter_platform_interface/CHANGELOG.md

@@ -5,7 +5,6 @@
 ## 2.11.0
 
 * Adds support for animating the camera with a duration.
-* Updates READMEs and API docs.
 
 ## 2.10.0