Update GITFLOW.adoc

Author: michalharakal

GITFLOW.adoc

@@ -55,7 +55,7 @@ GitFlow is a branching model for Git that defines specific branch types and thei
 
 == Workflow Diagram
 
-[mermaid]
+[source,mermaid]
 ....
 gitGraph
     commit id: "Initial"
@@ -311,4 +311,4 @@ git reset --hard HEAD~1
 
 GitFlow provides a structured approach to managing code changes in collaborative environments. By following this workflow consistently, the SKaiNET project maintains code quality, enables parallel development, and ensures stable releases.
 
-For questions or clarifications about this workflow, please refer to the original https://nvie.com/posts/a-successful-git-branching-model/[GitFlow article] or reach out to the project maintainers.
+For questions or clarifications about this workflow, please refer to the original https://nvie.com/posts/a-successful-git-branching-model/[GitFlow article] or reach out to the project maintainers.