www/py-django-photologue: Fix stage QA

• This was overlooked in 21900d66eda3 and was then noticed retrospectively during a bulk run after stage QA was extended in f35f902eb8f1:

[...]

> Running Q/A tests (stage-qa)

Error: Python package installs top-level 'scripts/' directory in site-packages
Error: Location: lib/python3.11/site-packages/scripts
[...]

• Bump PORTREVISION due changed package contents.

Approved by: portmgr (build fix blanket)
Fixes: 21900d66eda3 www/py-django-photologue: Update to 3.18