[doc]Update README.md

图标太大了，改小一些

Author: supperthomas

README.md

@@ -12,8 +12,7 @@
 [![GitHub pull-requests](https://img.shields.io/github/issues-pr/RT-Thread/rt-thread.svg)](https://github.com/RT-Thread/rt-thread/pulls)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat)](https://github.com/RT-Thread/rt-thread/pulls)
 [![RT-Thread BSP Static Build Check](https://github.com/RT-Thread/rt-thread/actions/workflows/bsp_buildings.yml/badge.svg)](https://github.com/RT-Thread/rt-thread/actions/workflows/bsp_buildings.yml)
-
-<a href="https://hellogithub.com/repository/5816fc3c1e714d109631ceb377538ca9" target="_blank"><img src="https://api.hellogithub.com/v1/widgets/recommend.svg?rid=5816fc3c1e714d109631ceb377538ca9&claim_uid=kVCe5FXIMGAjJfy" alt="Featured｜HelloGitHub" style="width: 250px; height: 54px;" width="250" height="54" /></a>
+<a href="https://hellogithub.com/repository/5816fc3c1e714d109631ceb377538ca9" target="_blank"><img src="https://api.hellogithub.com/v1/widgets/recommend.svg?rid=5816fc3c1e714d109631ceb377538ca9&claim_uid=kVCe5FXIMGAjJfy" alt="Featured｜HelloGitHub" style="width: 100px; height: 20px;" width="250" height="54" /></a>
 # RT-Thread
 
 RT-Thread was born in 2006, it is an open source, neutral, and community-based real-time operating system (RTOS).