Update REST API test version skip condition

Signed-off-by: Lukáš Vlček <lukas.vlcek@aiven.io>

CHANGELOG-3.0.md

@@ -48,7 +48,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix 'org.apache.hc.core5.http.ParseException: Invalid protocol version' under JDK 16+ ([#4827](https://github.com/opensearch-project/OpenSearch/pull/4827))
 - Fix compression support for h2c protocol ([#4944](https://github.com/opensearch-project/OpenSearch/pull/4944))
 - Don't over-allocate in HeapBufferedAsyncEntityConsumer in order to consume the response ([#9993](https://github.com/opensearch-project/OpenSearch/pull/9993))
-- Fix condition and parameter order for field cache utilization metric ([#13232](https://github.com/opensearch-project/OpenSearch/pull/13232))
+- Display all file cache metrics in NodeStats and use the correct human-readable field name ([#13232](https://github.com/opensearch-project/OpenSearch/pull/13232))
 
 ### Security
 

rest-api-spec/src/main/resources/rest-api-spec/test/nodes.stats/70_file_cache.yml

@@ -5,8 +5,8 @@
 ---
 "File Cache stats":
   - skip:
-      version: " - 2.15.99"
-      reason: "file cache fields were added in 2.7 but #13232 was not back-ported yet"
+      version: " - 2.16.0"
+      reason: "file cache statistics fields were added in 2.7 (#6485) but the fix (#13232) was merged after 2.16.0"
       features: [arbitrary_key]
 
   - do: