fix extra warning for unproperly formatted paths on windows

[Remi-Gau]

See workflow result: https://github.com/bids-standard/bids-matlab/actions/runs/4886810136/jobs/8722646644?pr=560

Examples

[�Warning: Escaped character '\d' is not valid. See 'doc sprintf' for supported special characters.]� 
  [�> In bids.internal.error_handling (line 48)
  In bids.internal.list_all_trial_types (line 91)
  In bids.internal.list_events (line 68)
  In test_list_events>test_list_events_basic (line 30)
  In MOxUnitFunctionHandleTestCase/run (line 30)
  In MOxUnitTestSuite/run (line 53)
  In MOxUnitTestSuite/run (line 53)
  In moxunit_runtests>@()run(suite,test_report,params.partition_index,params.partition_count) (line 149)
  In moxunit_runtests>run_all_tests (line 207)
  In moxunit_runtests (line 102)
  In run_tests (line 30)
  In command_4555f34d_7d26_429d_b5be_7a0ce2fbc109 (line 1)
  In mdcsbatch (line 58)]� 

test_rename_with_spec:  D:\a\bids-matlab\bids-matlab\tests\test_bids_file.m
  D:\\a\\bids-matlab\\bids-matlab\\tests\\wuasub-01_ses-test_task-faceRecognition_run-02_bold.nii --> D:\\a\\bids-matlab\\bids-matlab\\tests\\sub-01_ses-test_task-faceRecognition_run-02_desc-preproc_bold.nii

[Remi-Gau]

closing of for now

may reopen if not properly fixed