List async-class in the wheel index

index.html

@@ -12,6 +12,7 @@
 <a href="ascii/">ascii</a><br>
 <a href="asks/">asks</a><br>
 <a href="astropy/">astropy</a><br>
+<a href="async-class/">async-class</a><br>
 <a href="attrs/">attrs</a><br>
 <a href="av/">av</a><br>
 <a href="backports-zstd/">backports-zstd</a><br>