* docs clean up
- remove `important` call out - should all be replaced with `note` or `warning`
- remove unnecessary indent in code snippet for 3.0 release notes
* Update docs/releases/3.0.md
Co-authored-by: Dan Braghis <dan@zerolab.org>
- fix some broken refs that were lost in the migration to markdown files
- use lower_snake_case for all internal refs (most follow this convention)
- release process sub-section in docs should be named release schedule instead
- apply general fixes to existing markdown documentation
- various cases of rst syntax still used
- update some links to be the new format
- clean up line breaks (prettier)
I asked the question about using the `length` filter in https://github.com/wagtail/wagtail/discussions/7598 and I'm thinking it may not be needed anymore with the current version of Django that Wagtail supports.