Update netty-handler, netty-transport to 4.2.8.Final (#2578)

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

Author: scala-steward-asf[bot]

project/Dependencies.scala

@@ -34,7 +34,7 @@ object Dependencies {
   // https://github.com/aeron-io/aeron/blob/1.x.y/gradle/libs.versions.toml
   // (remember to also update the scala-steward pin)
   val agronaVersion = "2.2.4"
-  val nettyVersion = "4.2.7.Final"
+  val nettyVersion = "4.2.8.Final"
   val logbackVersion = "1.5.21"
 
   val jacksonAnnotationsVersion = "2.20"