修改文档：加入 HelloGitHub 徽章计划（明暗主题切换）

Signed-off-by: 沙漠之子 <[email protected]>

README.md

@@ -8,7 +8,13 @@
   [![license GPL-3.0][license-image]][license-url]
   [![GreasyFork installs][greasyFork-image]][greasyFork-url]
 
-<a href="https://hellogithub.com/repository/738d0abae49543f18d887a7e29ec9e90" target="_blank"><img src="https://api.hellogithub.com/v1/widgets/recommend.svg?rid=738d0abae49543f18d887a7e29ec9e90&claim_uid=zepvSg6Vwl4EqMr&theme=dark&theme=neutral&theme=dark" alt="Featured｜HelloGitHub" style="width: 250px; height: 54px;" width="250" height="54" /></a>
+<a href="https://hellogithub.com/repository/738d0abae49543f18d887a7e29ec9e90" target="_blank">
+  <picture>
+    <source media="(prefers-color-scheme: dark)" srcset="https://api.hellogithub.com/v1/widgets/recommend.svg?rid=738d0abae49543f18d887a7e29ec9e90&claim_uid=zepvSg6Vwl4EqMr&theme=dark" />
+    <source media="(prefers-color-scheme: light)" srcset="https://api.hellogithub.com/v1/widgets/recommend.svg?rid=738d0abae49543f18d887a7e29ec9e90&claim_uid=zepvSg6Vwl4EqMr&theme=neutral" />
+    <img alt="Featured｜HelloGitHub" src="https://api.hellogithub.com/v1/widgets/recommend.svg?rid=738d0abae49543f18d887a7e29ec9e90&claim_uid=zepvSg6Vwl4EqMr&theme=neutral" style="width: 250px; height: 54px;" width="250" height="54" />
+  </picture>
+</a>
 
 ## 💖 星标历史