Fix TupleMapExtensionTests

The compiler cannot infer F[_] on a concrete Tuple.Map[T, F[_]] because it reduces it to a (F[A], F[B], ...)

util-collection/src/test/scala/TupleMapExtensionTest.scala

@@ -1,13 +1,12 @@
 package sbt.internal.util
 
 import verify.BasicTestSuite
-import sbt.internal.util.TupleMapExtension.*
 
 object TupleMapExtensionTest extends BasicTestSuite:
   val tuple: Tuple.Map[(Int, String), Option] = ((Option(1), Option("foo")))
 
   test("tuple.mapN") {
     val f = (arg: (Int, String)) => arg._1.toString + "|" + arg._2
-    val actual = tuple.mapN[String](f)
+    val actual = TupleMapExtension.mapN[(Int, String), Option](tuple)(f)
     assert(actual == Option("1|foo"))
   }