fix: adapt tests/neg-custom-args/captures/puretest.scala to the cc library

Author: hamzaremmal

tests/neg-custom-args/captures/puretest.scala

@@ -6,7 +6,7 @@ def baz[CC[_] <: Pure]() = ()
 def bam[CC[A] <: Pure & Iterable[A]]() = ()
 def test =
   foo[Int]()  // error
-  bar[Int, List[Int]]() // error
-  baz[Seq]() // error
-  bam[Seq]() // error
+  bar[Int, List[Int]]() // OK
+  baz[Seq]() // OK
+  bam[Seq]() // OK
   foo[P]() // OK