Update protobuf-java, protobuf-java-util to 4.30.2

Author: scala-steward

build.sbt

@@ -10,7 +10,7 @@ lazy val ScalaVersions = new {
 }
 
 lazy val Versions = new {
-  val gpb3Version = "3.25.6"
+  val gpb3Version = "4.30.2"
   val grpcVersion = "1.68.3"
   val circeVersion = "0.14.12"
   val http4sVersion = "0.22.2"