Update dependency django_webpack_loader to v3.1.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
django_webpack_loader	==3.1.0 -> ==3.1.1

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Release Notes

django-webpack/django-webpack-loader (django_webpack_loader)

### [`v3.1.1`](https://togithub.com/django-webpack/django-webpack-loader/blob/HEAD/CHANGELOG.md#311----2024-08-30) [Compare Source](https://togithub.com/django-webpack/django-webpack-loader/compare/3.1.0...3.1.1) - Add support for Django 5.1

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