correcting readme.md

Author: msohailhussain

README.md

@@ -1,7 +1,7 @@
 # Optimizely Flutter SDK
 [![Apache 2.0](https://img.shields.io/github/license/nebula-plugins/gradle-extra-configurations-plugin.svg)](http://www.apache.org/licenses/LICENSE-2.0)
-[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/carthage/carthage)
 [![Build Status](https://github.com/optimizely/optimizely-flutter-sdk/actions/workflows/flutter.yml/badge.svg?branch=master)](https://github.com/optimizely/optimizely-flutter-sdk/actions)
+[![Pub](https://img.shields.io/pub/v/optimizely_flutter_sdk.svg)](https://pub.dev/packages/optimizely_flutter_sdk)
 
 This project is a starting point for a Flutter
 [plug-in package](https://flutter.dev/developing-packages/),