use scala3 for play

Author: waghanza

scala/play/build.sbt

@@ -1,11 +1,12 @@
 organization := "the-benchmarker"
 
 name := "server"
-scalaVersion := "2.13.12"
+scalaVersion := "3.3.1"
 
 lazy val root = (project
   .in(file("."))
   .settings(
+    PlayKeys.akkaHttpScala3Artifacts := true,
     libraryDependencies ++= Seq(
       guice,
       "com.typesafe.play" %% "play-json" % "[2.10,2.11)"