Fix test

-- Error: tests/init/pos/i12544.scala:5:9 ------------------------------------------------------------------------------
5 |  object nested:
  |         ^
  |         Cyclic object initialization for object nested, object Enum. Calling trace:
  |          -> object nested:	[ i12544.scala:5 ]
  |             -> val a: Enum = Case	[ i12544.scala:6 ]
  |               -> object Enum:	[ i12544.scala:4 ]
  |                -> val b: Enum = f(nested.a)	[ i12544.scala:8 ]

Author: liufengyun

tests/init/pos/i12544.scala renamed to tests/init/neg/i12544.scala

@@ -2,7 +2,7 @@ enum Enum:
   case Case
 
 object Enum:
-  object nested:
+  object nested:          // error
     val a: Enum = Case
 
   val b: Enum = f(nested.a)