Bump io.netty:netty-bom from 4.2.3.Final to 4.2.8.Final in /lang/java#434

dependabot[bot] wants to merge 1 commit intomasterwangyum/avro:masterfrom

dependabot/maven/lang/java/io.netty-netty-bom-4.2.8.Finalwangyum/avro:dependabot/maven/lang/java/io.netty-netty-bom-4.2.8.FinalCopy head branch name to clipboard