[DOCS] Fixes NLP size requirement on model reference page (#2517) (#2518

)

(cherry picked from commit d0e210f)

Co-authored-by: István Zoltán Szabó <istvan.szabo@elastic.co>

docs/en/stack/ml/nlp/ml-nlp-model-ref.asciidoc

@@ -9,7 +9,7 @@
 :frontmatter-tags-content-type: [reference] 
 :frontmatter-tags-user-goals: [analyze]
 
-The minimum dedicated ML node size for deploying and using the ELSER model 
+NOTE: The minimum dedicated ML node size for deploying and using the {nlp} models 
 is 16 GB in Elasticsearch Service if 
 {cloud}/ec-autoscaling.html[deployment autoscaling] is turned off. Turning on 
 autoscaling is recommended because it allows your deployment to dynamically