Mute org.elasticsearch.xpack.ml.integration.ClassificationIT testDependentVariableIsAliasToKeyword elastic#121492

Author: elasticsearchmachine

muted-tests.yml

@@ -546,3 +546,6 @@ tests:
 - class: org.elasticsearch.xpack.transform.checkpoint.TransformCCSCanMatchIT
   method: testTransformLifecycle_RangeQueryThatMatchesNoShards
   issue: https://github.com/elastic/elasticsearch/issues/121480
+- class: org.elasticsearch.xpack.ml.integration.ClassificationIT
+  method: testDependentVariableIsAliasToKeyword
+  issue: https://github.com/elastic/elasticsearch/issues/121492