test with java 25

[pjfanning]

• an experiment
• seems like there is an issue in scalafix - we might need to wait for a new release of scalafix that supports Java 25
• or the issue could in Scala compiler

[info] compiling 1 Scala source to /home/runner/work/pekko-http/pekko-http/http-scalafix/scalafix-rules/target/scala-2.13/classes ...
[43.193s][info][gc] GC(58) Pause Young (Prepare Mixed) (G1 Evacuation Pause) 703M->361M(768M) 36.317ms
[warn] /home/runner/work/pekko-http/pekko-http/http-scalafix/scalafix-rules/src/main/scala/org/apache/pekko/http/fix/MigrateToServerBuilder.scala:31:64: method args in trait Apply is deprecated: 4.6.0
[warn]           (t.parent.get, t.parent.get.asInstanceOf[Term.Apply].args.head)
[warn]                                                                ^
Warning: method args in trait Apply is deprecated: 4.6.0
[warn] /home/runner/work/pekko-http/pekko-http/http-scalafix/scalafix-rules/src/main/scala/org/apache/pekko/http/fix/MigrateToServerBuilder.scala:45:54: method args in trait Apply is deprecated: 4.6.0
[warn]         namedArgMap(args, t.asInstanceOf[Term.Apply].args) ++ materializerAndTarget.map("materializer" -> _._2).toSeq
[warn]                                                      ^
Warning: method args in trait Apply is deprecated: 4.6.0
[error] Error while emitting MigrateToServerBuilder.scala
[error] Unsupported class file major version 69
[error] Error while emitting MigrateToServerBuilder.scala
[error] Unsupported class file major version 69
[error] Error while emitting MigrateToServerBuilder.scala
[error] Unsupported class file major version 69
[error] Error while emitting MigrateToServerBuilder.scala
[error] Unsupported class file major version 69
[error] Error while emitting MigrateToServerBuilder.scala
[error] assertion failed: ClassBType.info not yet assigned: Ljava/lang/Object;
[error] Error while emitting MigrateToServerBuilder.scala
[error] assertion failed: ClassBType.info not yet assigned: Ljava/lang/Object;
[error] Error while emitting MigrateToServerBuilder.scala