Incorrect links to django-filters in web docs

* **What is the current behavior?**
Links in web docs (https://docs.graphene-python.org/projects/django/en/latest/filtering/) incorrectly refer to the `master` branch of `django-filter` instead of `main`/ `stable` or `latest`. Code base links are correct (but one used main and the second one stable name, however, it reference to the same docs on django-filter), so web docs should have the same links as in the code.

* **What is the expected behavior?**
* Links should refer to existing `django-filter` dosc

* **Please tell us about your environment:**

- Platform: Chrome/Debian