Fix maven source plugin args after version upgrading.

pom.xml

@@ -271,7 +271,7 @@
                             <execution>
                                 <id>attach-sources</id>
                                 <goals>
-                                    <goal>jar</goal>
+                                    <goal>jar-no-fork</goal>
                                 </goals>
                             </execution>
                         </executions>