fix: typo in error message

[Pareder]

📋 Changes

Fixed typo in error message of Auth0Client setup.

📎 References

🎯 Testing

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 82.61%. Comparing base (0ed21d1) to head (e325d22).

Files with missing lines	Patch %	Lines
src/server/client.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2127   +/-   ##
=======================================
  Coverage   82.61%   82.61%           
=======================================
  Files          21       21           
  Lines        2042     2042           
  Branches      358      358           
=======================================
  Hits         1687     1687           
  Misses        348      348           
  Partials        7        7           

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