Add the "publish" section to .asf.yaml in the master branch for updating metadata.
diff --git a/.asf.yaml b/.asf.yaml
index a300897..3257115 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -19,3 +19,5 @@
 staging:
   whoami: asf-staging
 
+publish:
+  whoami: asf-site