[Commonizer] Fixup test KT-51686 - type argument is parameterized class - nullability - 1

KT-51686

Author: sellmair

native/commonizer/tests/org/jetbrains/kotlin/commonizer/hierarchical/ParameterizedTypesCommonizationTest.kt

@@ -700,7 +700,7 @@ class ParameterizedTypesCommonizationTest : AbstractInlineSourcesCommonizationTe
                 typealias TA2<T> = X<T>?
                 
                 expect val p1: A<TA1<Unit>> 
-                expect val p2: A<TA1<Unit?> 
+                expect val p2: A<TA1<Unit?>>
                 expect val p3: A<TA1<Unit>?>
                 expect val p4: A<TA2<Unit>?>
                 expect val p5: A<TA2<Unit?>?>