Update dependency django to v5.1.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
django (changelog)	==5.1 -> ==5.1.1

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Release Notes

django/django (django)

### [`v5.1.1`](https://redirect.github.com/django/django/compare/5.1...5.1.1) [Compare Source](https://redirect.github.com/django/django/compare/5.1...5.1.1)

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