Fix github pages site-root
diff --git a/.asf.yaml b/.asf.yaml
index 10721b4..0c4d7cc 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -48,8 +48,11 @@
     main:
       required_signatures: false
 
+  del_branch_on_merge: true
+
   # Github Pages
   ghp_branch: gh-pages
+  ghp_path: ~
 
 notifications:
   commits:      commits@solr.apache.org