update eventmesh-panels.png (apache#363)

* [ISSUE apache#325]Update gradle configuration for publishing package to maven repository

* update build.gradle

* update build.gradle and gradle.properties

* update build.gradle and gradle.properties for publish to maven repository

* * update gradle version for instructions
* fix: dist task exception

* [ISSUE apache#329]Missing Log4j dependency

* update eventmesh-runtime.png

* update eventmesh-panels.png