Update remove-deprecated-methods.excludes

Author: pjfanning

stream/src/main/mima-filters/2.0.x.backwards.excludes/remove-deprecated-methods.excludes

@@ -34,7 +34,7 @@ ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.pekko.stream.java
 ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.pekko.stream.javadsl.RestartSink.withBackoff")
 ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.pekko.stream.javadsl.RestartSource.onFailuresWithBackoff")
 ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.pekko.stream.javadsl.RestartSource.withBackoff")
-ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.pekko.stream.javadsl.Source.actorRefWithAck")
+ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.pekko.stream.javadsl.Sink.actorRefWithAck")
 ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.pekko.stream.javadsl.Sink.foreachParallel")
 ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.pekko.stream.javadsl.Source.actorRefWithAck")
 ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.pekko.stream.scaladsl.Balance.this")