fix(mismatch): add invalid vendor for tabulate to avoid false positive on CVE-2024-13223

[Alina-Podoba]

This PR adds a mismatch rule to the mismatch database for pkg:pypi/tabulate to prevent a false positive on CVE-2024-13223.

Although the CVE refers to a WordPress plugin by vendor samwilson, it is incorrectly matched to the Python package tabulate due to name similarity.

To resolve this, I added samwilson to the invalid_vendors list in mismatch_data/pypi/tabulate/mismatch_relations.yml, following the project's instructions for resolving vendor mismatches.

fixes: #5082

[terriko]

Thank you! I 'm going to rebase your branch because I'm 99% certain the test fails are unrelated but I'd rather be sure before I merge in case some syntax error was making everything go haywire.