Fix import BxmlSub to correct path

[Miauwkeru]

This is in preparation of fox-it/dissect.eventlog#32 but also works without that fix

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.27%. Comparing base (8f584a7) to head (0037b2f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1737      +/-   ##
==========================================
+ Coverage   80.80%   81.27%   +0.47%     
==========================================
  Files         403      403              
  Lines       35377    35378       +1     
==========================================
+ Hits        28585    28754     +169     
+ Misses       6792     6624     -168     

Flag	Coverage Δ
unittests	81.27% <100.00%> (+0.47%)	⬆️

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[codspeed-hq]

Merging this PR will not alter performance

✅ 16 untouched benchmarks

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_{Comparing fix-eventlog-import (0037b2f) with main (8f584a7)}