Update the ML requirements in the prebuilt rules reference page (#6788)

* Updates reqs for ML rules

* Update docs/detections/prebuilt-rules/prebuilt-rules-reference.asciidoc

Co-authored-by: Janeen Mikell Roberts <[email protected]>

---------

Co-authored-by: Janeen Mikell Roberts <[email protected]>
(cherry picked from commit 21ad5a9)

Author: 2 people

docs/detections/prebuilt-rules/prebuilt-rules-reference.asciidoc

@@ -4,10 +4,7 @@
 
 This section lists all available prebuilt rules.
 
-IMPORTANT: To run {ml} prebuilt rules, you must have the
-https://www.elastic.co/subscriptions[appropriate license] or use a
-{ess-trial}[Cloud] deployment. All {ml} prebuilt rules are tagged with `ML`,
-and their rule type is `machine_learning`.
+IMPORTANT: All prebuilt {ml} rules are tagged with `ML`, and their rule type is `machine_learning`. Before using prebuilt {ml} rules, ensure you have all of <<ml-requirements, these requirements>>. 
 
 [width="100%",options="header"]
 |==============================================