Mute failing test (#56266)

see https://github.com/elastic/elasticsearch/issues/56265

qa/rolling-upgrade/src/test/java/org/elasticsearch/upgrades/RecoveryIT.java

@@ -431,6 +431,7 @@ public class RecoveryIT extends AbstractRollingTestCase {
      * is effectively closed and potentially replicated if the cluster supports replication of closed indices at the
      * time the index was closed.
      */
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/56265")
     public void testCloseIndexDuringRollingUpgrade() throws Exception {
         final Version minimumNodeVersion = minimumNodeVersion();
         final String indexName =