Fix export tests to support Scala Native 0.5.x syntax

Author: Gedochao

modules/integration/src/test/scala/scala/cli/integration/ExportTestProjects.scala

@@ -100,31 +100,31 @@ object ExportTestProjects {
     val nl = "\\n"
     val testFile =
       if (scalaVersion.startsWith("3."))
-        s"""//> using scala "$scalaVersion"
-           |//> using platform "scala-native"
+        s"""//> using scala $scalaVersion
+           |//> using platform scala-native
            |
            |import scala.scalanative.libc._
            |import scala.scalanative.unsafe._
            |
            |object Test:
            |  def main(args: Array[String]): Unit =
            |    val message = "Hello from " + "exported Scala CLI project" + "$nl"
-           |    Zone { implicit z =>
+           |    Zone {
            |      val io = StdioHelpers(stdio)
            |      io.printf(c"%s", toCString(message))
            |    }
            |""".stripMargin
       else
-        s"""//> using scala "$scalaVersion"
-           |//> using platform "scala-native"
+        s"""//> using scala $scalaVersion
+           |//> using platform scala-native
            |
            |import scala.scalanative.libc._
            |import scala.scalanative.unsafe._
            |
            |object Test {
            |  def main(args: Array[String]): Unit = {
            |    val message = "Hello from " + "exported Scala CLI project" + "$nl"
-           |    Zone { implicit z =>
+           |    Zone.acquire { implicit z =>
            |      val io = StdioHelpers(stdio)
            |      io.printf(c"%s", toCString(message))
            |    }