Add Labra-Flex to 'They use HLS.js in production!' section

[aaskaoui]

This PR will...

Add Labra-Flex (https://labra-flex.world/First-Lesson) to the "They use HLS.js in production!" section of the README.

Labra-Flex is a free interactive German learning platform that uses real HLS-based video lessons combined with AI-supported grammar analysis and exercises.

Why is this Pull Request needed?

To showcase real-world usage of HLS.js in an educational, video-based learning platform and contribute to the list of production users.

Are there any points in the code the reviewer needs to double check?

No. This PR only updates the README.

Resolves issues:

N/A

Checklist

• [x] changes have been done against master branch, and PR does not conflict
• [x] no code changes required, README only
• [x] no tests needed
• [x] no API changes

[aaskaoui]

Hi @robwalch, thank you again for the previous approval.

After fixing the image formatting issue, the GitHub Actions failed with actor not allowed because the PR comes from a forked repository.

Could you please approve and manually re-run the workflow? That should allow the lint check to complete successfully.

Thanks a lot!

[robwalch]

Could you please approve and manually re-run the workflow? That should allow the lint check to complete successfully.

Don't worry about the skipped actions. We only need the linter tasks that are part of build to pass. They are still failing.

Run npm run prettier && npm run sanity-check will run through all the tasks locally. npm run prettier alone will format the file you've modified. Run that and check in the changes.

[aaskaoui]

Thanks a lot for your support and guidance, @robwalch!
I’ve applied the project’s Prettier config as you suggested. Everything should be in order now.

Really appreciate your help and patience!