docs(contrib): fix headings, add embedded code

[mffap]

Tasks

Beta Give feedback

We're having trouble rendering your tasklist, it's most likely has one of the following formatting errors:

• indented tasks (i.e. nested tasklist; support for this is coming!)
• an empty task (i.e. - [ ] on a line by itself)
• any empty new lines (before/after the tasklist or in between tasks)
• duplicate issue/pr links
• a draft task exceeds 512 characters

Please check the tasklists documentation for more information. 🔗 Feedback Discussion

Thank you for participating in the Private Beta ❤️

1. I am happy with the code
2. Short description of the feature/issue is added in the pr description
3. PR is linked to the corresponding user story
4. Acceptance criteria are met
5. All open todos and follow ups are defined in a new ticket and justified
6. Deviations from the acceptance criteria and design are agreed with the PO and documented.
7. No debug or dead code
8. Critical parts are tested automatically
9. Where possible E2E tests are implemented
10. Documentation/examples are up-to-date
11. All non-functional requirements are met
12. Functionality of the acceptance criteria is checked manually on the dev system.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 4, 2023 1:50pm

[github-actions]

🎉 This PR is included in version 2.24.0-ignore-me2.1 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀