chore(deps): update dependency django to v6 #15566

Job	Run time
ci / revisions	3s
ci / build / Build, bleeding, amd64	3m 23s
ci / buildx / Build, bleeding, arm64	2m 51s
ci / Trivy Container Scan	2m 10s
ci / Anchore Container Scan	1m 54s
ci / test-split / Test container split, bleeding	9m 18s
ci / Merge images, bleeding	2m 44s
ci / test-saml / Test container saml, bleeding	8m 51s
ci / test-basic / Test container basic, bleeding	8m 54s
ci / test-localtime / Test container localtime, bleeding	9m 19s
ci / test-anubis / Test container anubis, bleeding	9m 15s
ci / test-novolume / Test container read-write, bleeding	9m 15s
ci / test-ssl / Test container basic, bleeding	11m 14s
ci / test-single-celery / Test container celery-single, bleeding	9m 20s
ci / Lint, bleeding	3s
ci / Tests, bleeding	3s
ci / Publish to GitHub, ${{ inputs.variant }}	0s
ci / Publish to Docker Hub, ${{ inputs.variant }}	0s
	1h 28m 37s

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