ignore exists' dsl factories differneces

Author: GreyPlane

Diff for: stream-tests/src/test/scala/org/apache/pekko/stream/DslFactoriesConsistencySpec.scala

@@ -41,8 +41,9 @@ class DslFactoriesConsistencySpec extends AnyWordSpec with Matchers {
       "futureFlow", // completionStageFlow
       "futureSink", // completionStageSink
       "lazyFutureSink", // lazyCompletionStageSink
-      "createGraph" // renamed/overload of create for getting type inference working in Scala 3
-    )
+      "createGraph", // renamed/overload of create for getting type inference working in Scala 3
+      // We box Scala Boolean to Java Boolean for better user experience
+      "exists")
 
   val javaIgnore =
     Set("adapt") // the scaladsl -> javadsl bridge