jujubot auto-reply on external PRs needs love

[james-garner-canonical]

Description

Current message:

Thanks for opening a pull request! Please follow the instructions here to ensure your pull request is ready for review. Then, a maintainer will review your patch.

@hpidcock @anvial

Link 404s. The 'correct' link would be https://github.com/juju/juju/blob/main/doc/CONTRIBUTING.md, but even then there's a bunch of Juju specific information that doesn't apply here, such as "Bug reports should be filed on Launchpad, not GitHub".

We should link to python-libjuju CONTRIBUTING.md instead, but at the very least that should be updated to explain the juju conventional commits convention, e.g. linking here.

Also it seems to double post? (See here and here).

Also it should probably ping someone else, like @dimaqq and I.

Urgency

Casually reporting

Python-libjuju version

main

Juju version

n/a

Reproduce / Test

...