[DOCS] Fixes typo.

docs/reference/inference/service-elser.asciidoc

@@ -129,7 +129,7 @@ If using the Python client, you can set the `timeout` parameter to a higher valu
 
 [discrete]
 [[inference-example-elser-adaptive-allocation]]
-==== Setting adaptive allocation for the ELSER service
+==== Setting adaptive allocations for the ELSER service
 
 NOTE: For more information on how to optimize your ELSER endpoints, refer to {ml-docs}/ml-nlp-elser.html#elser-recommendations[the ELSER recommendations] section in the model documentation.
 To learn more about model autoscaling, refer to the {ml-docs}/ml-nlp-auto-scale.html[trained model autoscaling] page.