Add developer description.

RongtongJin · RongtongJin · commit df2727e4a70f · 2022-01-07T10:10:48.000+08:00
diff --git a/pom.xml b/pom.xml
@@ -246,6 +246,13 @@
         </plugins>
     </build>
 
+    <developers>
+        <developer>
+            <id>OpenMessaging DLedger</id>
+            <name>OpenMessaging DLedger</name>
+            <url>https://github.com/openmessaging/dledger</url>
+        </developer>
+    </developers>
 
     <scm>
         <url>git@github.com:openmessaging/dledger.git</url>
