JAMES-3226 Fix .asf.yaml: Invalid notification target 'site-dev@james…

….apache.org' (#9)

Must be a valid @james.apache.org list!

.asf.yaml

@@ -18,7 +18,7 @@ github:
     - smtp
     - jmap
 notifications:
-  commits:      site-dev@james.apache.org
-  issues:       site-dev@james.apache.org
-  pullrequests: site-dev@james.apache.org
+  commits:      notifications@james.apache.org
+  issues:       notifications@james.apache.org
+  pullrequests: notifications@james.apache.org
   jira_options: link label worklog