Provide pathways to other contributions in first PR comment

[Timothy Schilling]

We have several people creating PRs which makes it difficult to deliver timely reviews. This makes contributing to Django a poor way for us to retain long-time contributors. A person is more likely to connect with the community in other ways such as contributing to other packages or community organizing. I'm suggesting we update the first-interaction github bot to note these other opportunities.

The suggested addition would be something similar to:

---

Please be aware that Django is a volunteer-driven project and the [queue of PRs](https://dashboard.djangoproject.com/#:~:text=Patches) is long. This means feedback can take weeks or months. In the meantime, there are other impactful ways to contribute beyond this repository:

- [Review other open PRs](https://code.djangoproject.com/query?status=!closed&needs_better_patch=0&needs_tests=0&needs_docs=0&has_patch=1&stage=Accepted&desc=1&order=changetime)
- Contribute to packages in the [Django ecosystem](https://www.djangoproject.com/community/ecosystem/)
- Explore [other opportunities to contribute](https://djangonaut.space/contribute/opportunities/) to the Django communuity.

[Natalia Bidart]

Thank you! Were you planning on working on this? No pressure, it's just that currently we see ticket being grabbed by first contributors and this may not be a good fit.

[Timothy Schilling]

Yup, yup. I can make the PR shortly.