Update .asf.yaml comments (#133)

* Update .asf.yaml comments

* Make the warning bigger

Author: alamb

.asf.yaml

@@ -19,6 +19,13 @@
 #
 # See more details at
 # https://cwiki.apache.org/confluence/display/INFRA/Git+-+.asf.yaml+features
+#
+
+###################################################################
+# NOTE This file is not automatically copied from the main branch to
+# the asf-site (publishing) branch, so if you make changes to this
+# file you need to move them manually to the asf-site branch
+###################################################################
 
 notifications:
   commits: commits@datafusion.apache.org
@@ -27,8 +34,8 @@ notifications:
   discussions: github@datafusion.apache.org
   jira_options: link label worklog
 github:
-  description: "Apache DataFusion Web Site"
-  homepage: https://datafusion.apache.org/
+  description: "Apache DataFusion Blogs "
+  homepage: https://datafusion.apache.org/blog
   enabled_merge_buttons:
     squash: true
     merge: false