Avoid removing unrelated mute

Author: alex-spies

muted-tests.yml

@@ -339,6 +339,8 @@ tests:
   issue: https://github.com/elastic/elasticsearch/issues/121253
 - class: org.elasticsearch.lucene.FullClusterRestartLuceneIndexCompatibilityIT
   issue: https://github.com/elastic/elasticsearch/issues/121257
+- class: org.elasticsearch.test.rest.ClientYamlTestSuiteIT
+  issue: https://github.com/elastic/elasticsearch/issues/121269
 - class: org.elasticsearch.upgrades.VectorSearchIT
   method: testBBQVectorSearch {upgradedNodes=1}
   issue: https://github.com/elastic/elasticsearch/issues/121271