fix(deps): update dependency django to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
django (changelog)	>4,<6.1 → >6,<7

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Release Notes

django/django (django)

v6.1.1

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v6.1

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v6.0.8

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v6.0.7

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v6.0.6

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v6.0.5

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v6.0.4

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v6.0.3

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v6.0.2

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v6.0.1

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v6.0

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v5.2.17

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v5.2.16

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v5.2.15

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
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The artifact failure details are included below:

File name: uv.lock

Using CPython 3.13.15 interpreter at: /opt/containerbase/tools/python/3.13.15/bin/python3.13
error: No solution found when resolving dependencies for split (markers: python_full_version == '3.11.*')
  cause: Because the requested Python version (>=3.11, <3.14) does not satisfy Python>=3.12 and django>=6.0.1 depends on Python>=3.12, we can conclude that django>=6.0.1 cannot be used.
         And because only the following versions of django are available:
             django<=6
             django>=6.0.1
         we can conclude that django>6 cannot be used.
         And because your project depends on django>6 and your project requires django-rubble[all], we can conclude that your project's requirements are unsatisfiable.

hint: While the active Python version is 3.13, the resolution failed for other Python versions supported by your project. Consider limiting your project's supported Python versions using `requires-python`.

hint: The `requires-python` value (>=3.11, <3.14) includes Python versions that are not supported by your dependencies (e.g., django>=6.0.1 only supports >=3.12). Consider using a more restrictive `requires-python` value (like >=3.12).