docs: fix jsdoc

[kanonji]

internal is removed at b38d450#diff-39f1e030815f30ed52f7f86a69761ef60e22bbfd1521ac8d065e6d86a4bc8337L18

Should I send PR for v1 too?
https://github.com/unjs/h3/blob/v1/src/error.ts#L20

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.02%. Comparing base (a58d7c9) to head (31f8e35).
Report is 209 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #945      +/-   ##
==========================================
+ Coverage   77.83%   79.02%   +1.18%     
==========================================
  Files          47       43       -4     
  Lines        4286     3232    -1054     
  Branches      611      795     +184     
==========================================
- Hits         3336     2554     -782     
+ Misses        933      675     -258     
+ Partials       17        3      -14     

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[nozomuikuta]

@kanonji

Thank you for the PR!
It's appreciated if you submit another PR to v1 as well.