Reformat .asf.yaml email as comma separated string
diff --git a/.asf.yaml b/.asf.yaml
index fe5f151..1774d16 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -1,11 +1,5 @@
 notifications:
-    commits:
-        - java-commits@axis.apache.org
-        - c-commits@axis.apache.org
-    issues:
-        - java-dev@axis.apache.org
-        - c-dev@axis.apache.org
-    pullrequests:
-        - java-dev@axis.apache.org
-        - c-dev@axis.apache.org
-    jira_options: link label link label
+    commits: java-commits@axis.apache.org,c-commits@axis.apache.org
+    issues: java-dev@axis.apache.org,c-dev@axis.apache.org
+    pullrequests: java-dev@axis.apache.org,c-dev@axis.apache.org
+    jira_options: link label