Mute org.elasticsearch.xpack.ml.integration.ClassificationIT testSingleNumericFeatureAndMixedTrainingAndNonTrainingRows elastic#121479

Author: elasticsearchmachine

muted-tests.yml

@@ -528,3 +528,6 @@ tests:
 - class: org.elasticsearch.xpack.ml.integration.ClassificationIT
   method: testWithOnlyTrainingRowsAndTrainingPercentIsFifty_DependentVariableIsTextAndKeyword
   issue: https://github.com/elastic/elasticsearch/issues/121502
+- class: org.elasticsearch.xpack.ml.integration.ClassificationIT
+  method: testSingleNumericFeatureAndMixedTrainingAndNonTrainingRows
+  issue: https://github.com/elastic/elasticsearch/issues/121479