Update Changelog

Signed-off-by: Rabi Panda <adnapibar@gmail.com>

CHANGELOG.md

@@ -34,6 +34,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add query for initialized extensions ([#5658](https://github.com/opensearch-project/OpenSearch/pull/5658))
 - Revert 'Added jackson dependency to server' and change extension reading ([#5768](https://github.com/opensearch-project/OpenSearch/pull/5768))
 - Add support to disallow search request with preference parameter with strict weighted shard routing([#5874](https://github.com/opensearch-project/OpenSearch/pull/5874))
+- Add update settings allowlist for searchable snapshot ([#5907](https://github.com/opensearch-project/OpenSearch/pull/5907))
 
 ### Dependencies
 - Bumps `log4j-core` from 2.18.0 to 2.19.0

server/src/internalClusterTest/java/org/opensearch/snapshots/SearchableSnapshotIT.java

@@ -216,8 +216,8 @@ public void testSearchableSnapshotIndexIsReadOnly() throws Exception {
         restoreSnapshotAndEnsureGreen(client, snapshotName, repoName);
 
         assertIndexingBlocked(restoredIndexName);
-        assertIndexSettingChangeBlocked(restoredIndexName);
-        assertAllowedIndexSettingUpdate(restoredIndexName);
+        assertUpdateIndexSettingsDefault(restoredIndexName);
+        assertUpdateIndexSettingsAllowList(restoredIndexName);
         assertTrue(client.admin().indices().prepareDelete(restoredIndexName).get().isAcknowledged());
         assertThrows(
             "Expect index to not exist",
@@ -328,7 +328,7 @@ private void assertIndexingBlocked(String index) {
         }
     }
 
-    private void assertIndexSettingChangeBlocked(String index) {
+    private void assertUpdateIndexSettingsDefault(String index) {
         try {
             final UpdateSettingsRequestBuilder builder = client().admin().indices().prepareUpdateSettings(index);
             builder.setSettings(Map.of("index.refresh_interval", 10));
@@ -339,7 +339,7 @@ private void assertIndexSettingChangeBlocked(String index) {
         }
     }
 
-    private void assertAllowedIndexSettingUpdate(String index) {
+    private void assertUpdateIndexSettingsAllowList(String index) {
         final UpdateSettingsRequestBuilder builder = client().admin().indices().prepareUpdateSettings(index);
         builder.setSettings(Map.of("index.max_result_window", 100));
         AcknowledgedResponse settingsResponse = builder.execute().actionGet();