Fix getTime field name to time in GetStats (opensearch-project#16894)

Signed-off-by: hye-on <[email protected]>

CHANGELOG.md

@@ -97,7 +97,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix Shallow copy snapshot failures on closed index ([#16868](https://github.com/opensearch-project/OpenSearch/pull/16868))
 - Fix multi-value sort for unsigned long ([#16732](https://github.com/opensearch-project/OpenSearch/pull/16732))
 - The `phone-search` analyzer no longer emits the tel/sip prefix, international calling code, extension numbers and unformatted input as a token ([#16993](https://github.com/opensearch-project/OpenSearch/pull/16993))
-
+- Fix `GetStats` field serialization where `getTime` is used instead of `time` ([#17008](https://github.com/opensearch-project/OpenSearch/pull/17008))
 ### Security
 
 [Unreleased 2.x]: https://github.com/opensearch-project/OpenSearch/compare/2.18...2.x

server/src/main/java/org/opensearch/index/get/GetStats.java

@@ -155,7 +155,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
     static final class Fields {
         static final String GET = "get";
         static final String TOTAL = "total";
-        static final String TIME = "getTime";
+        static final String TIME = "time";
         static final String TIME_IN_MILLIS = "time_in_millis";
         static final String EXISTS_TOTAL = "exists_total";
         static final String EXISTS_TIME = "exists_time";