Bump django-stubs from 4.2.2 to 4.2.6

[dependabot[bot]]

Bumps django-stubs from 4.2.2 to 4.2.6.

Commits

• a9e6f67 Version 4.2.6 release (django-stubs only) (#1794)
• bef529e [pre-commit.ci] pre-commit autoupdate (#1795)
• c313cfd Fix IndexError crash when using from_queryset() of custom Manager subclass (#...
• 7c058b8 Update Django db backend base wrapper (#1791)
• 6458248 Revert "Use parse_bool implementation from mypy" (#1792)
• 0ce571e fix as manager and from queryset self types (#1788) (#1789)
• 1334efd django.core.management stub update (#1787)
• 35bd241 Fix Field.formfield(), GeometryField.formfield() methods (#1778)
• a9c56a9 Drop hard dependency on mypy (#1782)
• 7815bb8 Bump mypy from 1.6.0 to 1.6.1 (#1779)
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #359.