docs(consistent-type-specifier-style): correct default option

[privatenumber]

The default value in the docs are incorrect.

In the code, the default is prefer-top-level:
https://github.com/un-ts/eslint-plugin-import-x/blob/v4.6.1/src/rules/consistent-type-specifier-style.ts#L120

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.11%. Comparing base (fbf639b) to head (6eeff69).
Report is 11 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #220      +/-   ##
==========================================
- Coverage   96.12%   96.11%   -0.02%     
==========================================
  Files         104      105       +1     
  Lines        4752     4782      +30     
  Branches     1633     1646      +13     
==========================================
+ Hits         4568     4596      +28     
- Misses        179      181       +2     
  Partials        5        5              

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