fix(helper/cookie): correct getSignedCookie parameters type

[Hill-98]

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 (c277c75) to head (c20c6aa).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4123      +/-   ##
==========================================
- Coverage   91.34%   91.31%   -0.04%     
==========================================
  Files         168      168              
  Lines       10700    10784      +84     
  Branches     3181     3045     -136     
==========================================
+ Hits         9774     9847      +73     
- Misses        925      936      +11     
  Partials        1        1              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[yusukebe]

LGTM!

[yusukebe]

@Hill-98

It's a bug! Thanks. I'll merge this now.