fix(utils/url): calculate ends with slash on every iteration

[luxass]

This fixes #3909

I don't know if this is the best way of doing this, if you can find a better/faster way let me know! :)

The author should do the following, if applicable

• Add tests
• Run tests
• bun run format:fix && bun run lint:fix to format the code
• Add TSDoc/JSDoc to document the code

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.31%. Comparing base (6ceb1ab) to head (e009b25).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3910      +/-   ##
==========================================
+ Coverage   91.28%   91.31%   +0.03%     
==========================================
  Files         168      168              
  Lines       10757    10673      -84     
  Branches     3168     3046     -122     
==========================================
- Hits         9819     9746      -73     
+ Misses        937      926      -11     
  Partials        1        1              

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[yusukebe]

LGTM!

[yusukebe]

Hi @luxass !

Looks good. Thank you so much!