1、更新 ReadMe

Author: BytesZero

README.md

@@ -4,9 +4,9 @@
 <h3 align="center">一款优质的 Flutter 广告插件（腾讯广告、广点通、优量汇）</h3>
 
 <p align="center">
-<a href="https://github.com/FlutterAds/flutter_qq_ads"><img src=https://img.shields.io/badge/null_safety-v2.5.0-success></a>
+<a href="https://github.com/FlutterAds/flutter_qq_ads"><img src=https://img.shields.io/badge/pub-v2.5.0-success></a>
 <a href="https://github.com/FlutterAds/flutter_qq_ads"><img src=https://img.shields.io/badge/platform-iOS%20%7C%20Android-brightgreen></a>
-<a href="https://github.com/FlutterAds/flutter_qq_ads/actions/workflows/flutter.yml"><img src="https://github.com/FlutterAds/flutter_qq_ads/actions/workflows/flutter.yml/badge.svg?branch=2x"></a>
+<a href="https://github.com/FlutterAds/flutter_qq_ads/actions/workflows/flutter.yml"><img src="https://github.com/FlutterAds/flutter_qq_ads/actions/workflows/flutter.yml/badge.svg"></a>
 <a href="https://github.com/FlutterAds/flutter_qq_ads"><img src=https://img.shields.io/github/stars/FlutterAds/flutter_qq_ads?color=brightgreen></a>
 <a href="https://github.com/FlutterAds/flutter_qq_ads/blob/develop/LICENSE"><img src=https://img.shields.io/badge/license-MIT-brightgreen></a>
 </p>