Update netty-handler, netty-transport to 4.2.9.Final (#2589) (#2590)

Co-authored-by: scala-steward-asf[bot] <147768647+scala-steward-asf[bot]@users.noreply.github.com>

Author: pjfanning

project/Dependencies.scala

@@ -36,7 +36,7 @@ object Dependencies {
   // needs to be inline with the aeron version, check
   // https://github.com/real-logic/aeron/blob/1.x.y/build.gradle
   val agronaVersion = "1.22.0"
-  val nettyVersion = "4.2.7.Final"
+  val nettyVersion = "4.2.9.Final"
   val logbackVersion = "1.3.15"
 
   val jacksonAnnotationsVersion = "2.20"