Update dependency django-formtools to v2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
django-formtools (source)	1.0 -> 2.4
django-formtools (source)	==1.0 -> ==2.4

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Release Notes

jazzband/django-formtools

### [`v2.4`](https://togithub.com/jazzband/django-formtools/compare/2.3...2.4) [Compare Source](https://togithub.com/jazzband/django-formtools/compare/2.3...2.4) ### [`v2.3`](https://togithub.com/jazzband/django-formtools/compare/2.2...2.3) [Compare Source](https://togithub.com/jazzband/django-formtools/compare/2.2...2.3) ### [`v2.2`](https://togithub.com/jazzband/django-formtools/compare/2.1...2.2) [Compare Source](https://togithub.com/jazzband/django-formtools/compare/2.1...2.2) ### [`v2.1`](https://togithub.com/jazzband/django-formtools/compare/2.0...2.1) [Compare Source](https://togithub.com/jazzband/django-formtools/compare/2.0...2.1) ### [`v2.0`](https://togithub.com/jazzband/django-formtools/compare/1.0...2.0) [Compare Source](https://togithub.com/jazzband/django-formtools/compare/1.0...2.0)

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