Update docs/reference/api-conventions.asciidoc

Co-authored-by: David Turner <[email protected]>

docs/reference/api-conventions.asciidoc

@@ -306,7 +306,7 @@ Accept: application/vnd.elasticsearch+json; compatible-with=7
 [[api-push-back]]
 === `TOO_MANY_REQUESTS (429)` status code push back
 
-Elasticsearch may respond with a `TOO_MANY_REQUESTS (429)` status code, indicating that it is too busy right now to
+All {es} APIs may respond with the HTTP `429 Too Many Requests` status code, indicating that the cluster is too busy right now to
 handle the request. When this happens, you should consider to retry the operation after a short delay, preferably
 with randomized exponential back-off.