Update README.md (#8680)

Author: HeJiachen-PM

README.md

@@ -1,7 +1,7 @@
 <div align="center">
 
 <h1 style="border-bottom: none">
-    <b><a href="https://affine.pro">AFFiNE.PRO</a></b><br />
+    <b><a href="https://affine.pro">AFFiNE.Pro</a></b><br />
     Write, Draw and Plan All at Once
     <br>
 </h1>