[OpenAPI] Minor 8.x fixes

Author: lcawl

.spectral.yaml

@@ -19,6 +19,8 @@ rules:
   operation-operationId-valid-in-url: warn
   operation-tag-defined: warn
   operation-tags: warn
+  # Parameters
+  path-params: warn
   # Responses
   operation-success-response: warn
   # Schema

docs/overlays/elasticsearch-openapi-overlays.yaml

@@ -11,7 +11,7 @@ actions:
       description: >
         ## 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 `8.x` 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/).
       x-doc-license:
         name: Attribution-NonCommercial-NoDerivatives 4.0 International

docs/overlays/elasticsearch-serverless-openapi-overlays.yaml

@@ -15,7 +15,7 @@ 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 `8.x` 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/).
       x-doc-license:
         name: Attribution-NonCommercial-NoDerivatives 4.0 International