Mute org.elasticsearch.xpack.ml.integration.ClassificationIT testWithOnlyTrainingRowsAndTrainingPercentIsFifty_DependentVariableIsTextAndKeyword elastic#121502

Author: elasticsearchmachine

muted-tests.yml

@@ -525,3 +525,6 @@ tests:
 - class: org.elasticsearch.xpack.ml.integration.ClassificationIT
   method: testDeleteExpiredData_RemovesUnusedState
   issue: https://github.com/elastic/elasticsearch/issues/116234
+- class: org.elasticsearch.xpack.ml.integration.ClassificationIT
+  method: testWithOnlyTrainingRowsAndTrainingPercentIsFifty_DependentVariableIsTextAndKeyword
+  issue: https://github.com/elastic/elasticsearch/issues/121502