docs(example): fix update sample image path to be relative (#2864)

* Update sample image path to be relative

The example script currently uses a relative path (tests\data\...) to load the sample image. This causes a FileNotFoundError if the script is not executed strictly from the repository root (e.g., when running directly from an IDE or the script's own directory).



Signed-off-by: Nikhil Singh <124866156+Ritinikhil@users.noreply.github.com>

* Update docs/examples/experimental/process_table_crops.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Signed-off-by: Peter W. J. Staar <91719829+PeterStaar-IBM@users.noreply.github.com>

* formatter and linter

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

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Signed-off-by: Nikhil Singh <124866156+Ritinikhil@users.noreply.github.com>
Signed-off-by: Peter W. J. Staar <91719829+PeterStaar-IBM@users.noreply.github.com>
Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>
Co-authored-by: Peter W. J. Staar <91719829+PeterStaar-IBM@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Michele Dolfi <dol@zurich.ibm.com>