correction to use github-pages on .asf.yaml
diff --git a/.asf.yaml b/.asf.yaml
index 9d16110..711ab0d 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -22,6 +22,7 @@
 
 publish:
   whoami:  asf-site
+  subdir: /
 
 github:
   description: "Apache Wayang is an Cross-Platform processing system"