Update doc_guidelines.adoc

@openshift/team-documentation please ignore my previous half complete sentence. :D.

Author: vikram-redhat

contributing_to_docs/doc_guidelines.adoc

@@ -371,9 +371,10 @@ To indicate that a feature is in Technology Preview, include the
 supportablity wording consistent across Technology Preview features.
 
 Example:
+====
 :FeatureName: Custom profiles for custom tuning specification 
 include::modules/technology-preview.adoc[]
-
+====
 
 See
 link:https://github.com/openshift/openshift-docs/pull/13878/files#diff-615ba1bf3b09d11a9c2604b775aa32f2[an