Changed ErrorCause schema header type to map (#983)

* Changed  schema header type to map

Signed-off-by: xil <[email protected]>

Author: lucy66hw

CHANGELOG.md

@@ -199,6 +199,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Changed `ScriptedMetricAggregate` value from true to {} ([#892](https://github.com/opensearch-project/opensearch-api-specification/pull/892))
 - Changed `WaitForActiveShards` to utilize `StringifiedInteger` ([#896](https://github.com/opensearch-project/opensearch-api-specification/pull/896))
 - Changed `NeuralStats` schema validation from `oneOf` to `anyOf` ([#900](https://github.com/opensearch-project/opensearch-api-specification/pull/900))
+- Changed `ErrorCause` schema header type to map ([#982](https://github.com/opensearch-project/opensearch-api-specification/pull/982))
 
 ## [0.1.0] - 2024-10-25
 

spec/schemas/_common.yaml

@@ -360,11 +360,9 @@ components:
           items:
             $ref: '#/components/schemas/ErrorCause'
         header:
-          oneOf:
-            - type: string
-            - type: array
-              items:
-                type: string
+          type: object
+          additionalProperties:
+            $ref: '#/components/schemas/StringOrStringArray'
       required:
         - type
       additionalProperties: