docs: add labels to README

[mtrezza]

New Pull Request Checklist

• [x] I am not disclosing a vulnerability.
• [x] I am creating this PR in reference to an issue.

Issue Description

Badges missing for release automation, discourse

Related issue: #n/a

Approach

Add missing badges.

TODOs before merging

• [x] A changelog entry is created automatically using the pull request title (do not manually add a changelog entry)

[parse-github-assistant[bot]]

Thanks for opening this pull request!

• 🎉 We are excited about your hands-on contribution!

[parseplatformorg]

🎉 This change has been released in version 2.0.4