[Kapt4] Update Kapt4 test data after AA Standalone fix for sealed inheritors

- The Standalone Analysis API now correctly calculates sealed inheritors
  in source modules. This causes Kapt4 to pick up on sealed subclasses
  in the `modifiers` test. The change is in line with the non-FIR test
  results in `modifiers.txt`.

^KT-66013

plugins/kapt3/kapt3-compiler/testData/converter/modifiers.fir.txt

@@ -274,6 +274,10 @@ package modifiers;
  *
  *   // nested class: Four
  *
+ *   // sealed subclass: modifiers/SealedClass.One
+ *
+ *   // sealed subclass: modifiers/SealedClass.Two
+ *
  *   // module name: main
  * }
  */