Mute org.elasticsearch.xpack.application.ModelRegistryUpgradeIT testUpgradeModels {upgradedNodes=3} #125535

Author: elasticsearchmachine

muted-tests.yml

@@ -486,3 +486,6 @@ tests:
 - class: org.elasticsearch.xpack.application.HuggingFaceServiceUpgradeIT
   method: testElser {upgradedNodes=3}
   issue: https://github.com/elastic/elasticsearch/issues/125544
+- class: org.elasticsearch.xpack.application.ModelRegistryUpgradeIT
+  method: testUpgradeModels {upgradedNodes=3}
+  issue: https://github.com/elastic/elasticsearch/issues/125535