Update branch in elasticsearch-openapi-overlays.yaml (#5529)

Author: lcawl

docs/overlays/elasticsearch-openapi-overlays.yaml

@@ -14,7 +14,7 @@ actions:
         
         ## Documentation source and versions
         
-        This documentation is derived from the `main` branch of the [elasticsearch-specification](https://github.com/elastic/elasticsearch-specification) repository.
+        This documentation is derived from the `9.2` branch of the [elasticsearch-specification](https://github.com/elastic/elasticsearch-specification) repository.
         It is provided under license [Attribution-NonCommercial-NoDerivatives 4.0 International](https://creativecommons.org/licenses/by-nc-nd/4.0/).
 
         This documentation contains work-in-progress information for future Elastic Stack releases.
@@ -73,4 +73,4 @@ actions:
   - target: "$.components['schemas']['cat._types.CatNodeColumn']"
     description: Add basic string data type for cat node columns
     update:
-      type: string
+      type: string