remove apache stage repo & update notification rule (#232)

Author: z7658329

.asf.yaml

@@ -46,8 +46,8 @@ github:
         required_approving_review_count: 2
 
 notifications:
-  pullrequests_status: dev@hugegraph.apache.org
+  #pullrequests_status: dev@hugegraph.apache.org
   # Note: before use the config, we should ensure the "mail" address has set well (exist)
   #pullrequests_comment: issues@hugegraph.apache.org
   #issues: issues@hugegraph.apache.org
-  #discussions:  issues@hugegraph.apache.org
+  discussions:  dev@hugegraph.apache.org

pom.xml

@@ -526,19 +526,4 @@
             </build>
         </profile>
     </profiles>
-
-    <repositories>
-        <repository>
-            <id>staged-releases</id>
-            <name>staged-releases</name>
-            <url>https://repository.apache.org/content/groups/staging/</url>
-            <layout>default</layout>
-            <releases>
-                <enabled>true</enabled>
-            </releases>
-            <snapshots>
-                <enabled>false</enabled>
-            </snapshots>
-        </repository>
-    </repositories>
 </project>