Mute FollowerFailOverIT testReadRequestsReturnsLatestMappingVersion

Due to https://github.com/elastic/elasticsearch/issues/37807

x-pack/plugin/ccr/src/test/java/org/elasticsearch/xpack/ccr/FollowerFailOverIT.java

@@ -230,6 +230,7 @@ public class FollowerFailOverIT extends CcrIntegTestCase {
         pauseFollow("follower-index");
     }
 
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/37807")
     public void testReadRequestsReturnsLatestMappingVersion() throws Exception {
         InternalTestCluster leaderCluster = getLeaderCluster();
         Settings nodeAttributes = Settings.builder().put("node.attr.box", "large").build();