Update rest-api-spec 8.x (#2971)

* Update rest-api-spec

* Remove flat_settings, add include_remotes

---------

Co-authored-by: pquentin <[email protected]>
Co-authored-by: Quentin Pradet <[email protected]>

Author: github-actions[bot]

output/openapi/elasticsearch-openapi.json

@@ -28,9 +28,9 @@
       ]
     },
     "params": {
-      "flat_settings": {
+      "include_remotes": {
         "type": "boolean",
-        "description": "Return settings in flat format (default: false)"
+        "description": "Include remote cluster data into the response (default: false)"
       },
       "timeout": {
         "type": "time",

output/openapi/elasticsearch-serverless-openapi.json

@@ -37,10 +37,10 @@ export interface Request extends RequestBase {
   }
   query_parameters: {
     /**
-     * If `true`, returns settings in flat format.
+     * Include remote cluster data into the response
      * @server_default false
      */
-    flat_settings?: boolean
+    include_remotes?: boolean
     /**
      * Period to wait for each node to respond.
      * If a node does not respond before its timeout expires, the response does not include its stats.