CI docs dev failing

[ddobie]

Looks like it's a poetry lock issue that should be resolved when I merge #728 but just noting it here anyway

https://github.com/askap-vast/vast-pipeline/actions/runs/10293250744/job/28489187783

[ddobie]

The initial problem outlined stems from a markdown issue that is fixed by forcing markdown==3.3.7.

However this reveals an initial problem that's first pointed out by @ajstewart in #486. pytkdocs should not be updated past 0.11.1, but looking at the associated PR (#627), pytkdocs gets bumped to 0.15 in the poetry.lock file.