Upgrade to Maven 3.8.6 (#12822)
Upgrade to Maven 3.8.6 (#12822)

Motivation:
Maven 3.8.6 is available with various changes.

See: https://lists.apache.org/thread/44817jckpzy7gtrkds9xfrgybmrrbm1z

Modification:
Upgraded to Maven 3.8.6

Result:
The latest version of Maven

netty/netty,netty/netty,netty/netty,netty/netty,netty/netty