docs: add feepay sponsor

Co-authored-by: naiba/CloudCode <hi+cloudcode@nai.ba>

README.md

@@ -21,7 +21,19 @@
 
 ## Sponsors / 赞助商
 
-> 🤝 Sponsorship slot available / 赞助位待认领
+<table>
+  <tr>
+    <td align="center">
+      <a href="https://t.me/feepayNotice">
+        <img src=".github/sponsor/feepay.jpg" alt="feepay" width="160">
+      </a>
+      <br>
+      <b>feepay收款，独角异次元。</b>
+      <br><br>
+      👉 <a href="https://t.me/feepayNotice">feepay</a>
+    </td>
+  </tr>
+</table>
 
 ## User Guide