KOGITO-5560 remove 'preview'label from community website

(cherry picked from commit 2352ac1)

docs/src/main/asciidoc/kogito.adoc

@@ -6,7 +6,6 @@ https://github.com/quarkusio/quarkus/tree/main/docs/src/main/asciidoc
 = Quarkus - Using Kogito to add business automation capabilities to an application
 
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-:extension-status: preview
 
 This guide demonstrates how your Quarkus application can use Kogito to add business automation
 to power it up with business processes and rules.
@@ -16,8 +15,6 @@ Drools (for business rules) and jBPM (for business processes). Kogito aims at pr
 to business automation where the main message is to expose your business knowledge (processes, rules and decisions)
 in a domain specific way.
 
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 == Prerequisites
 
 To complete this guide, you need: