Update Beli Feed app

[leoadberg]

Neglected this for a while, but updated to the new Beli API

[tidbyt[bot]]

⚠️ The automated review process is experimental and likely has bugs. Please bear with us as we iron out the kinks and enable you to ship changes at high velocity 🚀

Next Steps

Hello! Thank you so much for your change 🤜 🤛 . There are a few things you need to do:

• [ ] Sign the CLA if you haven't already
• [ ] Ensure your build is green! Any problem will display a proposed solution to try out
• [ ] Get a review, either by Tidbyt Bot or by a Tidbyt engineer

  Manual Review Required

  Hang tight! A Tidbyt engineer will be by shortly to review your change. Here is what they will be looking for:		Test	Details
  ✅	App Dir	All files are in a single app directory
  🟡	Modules	Usage of cache.star requires review
  ✅	Original Author	The original author matches the PR author