fix: get pyproject.toml path from PDM

[GabDug]

No description provided.

[codecov]

Codecov Report

Merging #5 (24d988e) into main (80a5d30) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main       #5   +/-   ##
=======================================
  Coverage   97.01%   97.01%           
=======================================
  Files           9        9           
  Lines         369      369           
  Branches       66       66           
=======================================
  Hits          358      358           
  Misses         10       10           
  Partials        1        1           

Flag	Coverage Δ
unittests	97.01% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
src/sync_pre_commit_lock/config.py	100.00% <ø> (ø)
src/sync_pre_commit_lock/pdm_plugin.py	92.98% <100.00%> (ø)