[stubsabot] Bump django-filter to 26.1.*

Release: https://pypi.org/pypi/django-filter/26.1
Homepage: https://github.com/carltongibson/django-filter/tree/main
Repository: https://github.com/carltongibson/django-filter/
Typeshed stubs: https://github.com/python/typeshed/tree/main/stubs/django-filter
Changelog: https://github.com/carltongibson/django-filter/blob/main/CHANGES.rst
Diff: carltongibson/django-filter@25.2...26.1

Stubsabot analysis of the diff between the two releases:
 - 0 public Python files have been added.
 - 0 files included in typeshed's stubs have been deleted.
 - 1 file included in typeshed's stubs has been modified or renamed: `django_filters/__init__.py`.
 - Total lines of Python code added: 1.
 - Total lines of Python code deleted: 1.

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- Leave this PR open (as a reminder, and to prevent stubsabot from opening another PR)
- Fix stubtest failures in another PR, then close this PR

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Author: stubsabot

stubs/django-filter/METADATA.toml

@@ -1,4 +1,4 @@
-version = "25.2.*"
+version = "26.1.*"
 upstream-repository = "https://github.com/carltongibson/django-filter/"
 dependencies = ["django-stubs"]