🐛 Fix trailing slash in upload_from source

[github-actions[bot]]

🚀 Deployed on https://664fa23e02088c6871a308b6--lamindb-setup-htry.netlify.app

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 81.19%. Comparing base (8124b95) to head (942a1a4).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #773 +/- ## ======================================= Coverage 81.19% 81.19% ======================================= Files 40 40 Lines 2867 2867 ======================================= Hits 2328 2328 Misses 539 539 ```

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[falexwolf]

Looks good!