Modifies the description of PUT inference OpenAI. (#4066)

(cherry picked from commit ae99584)

Author: szabosteve

output/openapi/elasticsearch-openapi.json

@@ -28,7 +28,7 @@ import { integer } from '@_types/Numeric'
 /**
  * Create an OpenAI inference endpoint.
  *
- * Create an inference endpoint to perform an inference task with the `openai` service.
+ * Create an inference endpoint to perform an inference task with the `openai` service or `openai` compatible APIs.
  *
  * When you create an inference endpoint, the associated machine learning model is automatically deployed if it is not already running.
  * After creating the endpoint, wait for the model deployment to complete before using it.