fix: remapping sourcemap from transform hook

[underfin]

Description

[netlify]

✅ Deploy Preview for rolldown-rs canceled.

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[netlify]

✅ Deploy Preview for rolldown-rs canceled.

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[github-actions]

Benchmark

Benchmark suite	Current: 97d7641	Previous: 97ea4b6	Ratio
threejs10x	306.05 ms / ops	380.34 ms / ops	0.80
threejs10x-sourcemap	420.26 ms / ops	430.97 ms / ops	0.98

This comment was automatically generated by workflow using github-action-benchmark.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.62%. Comparing base (97ea4b6) to head (97d7641).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #755   +/-   ##
=======================================
  Coverage   79.62%   79.62%           
=======================================
  Files         128      128           
  Lines        6568     6568           
=======================================
  Hits         5230     5230           
  Misses       1338     1338           

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