requirements: Upgrade Python requirements.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
(cherry picked from commit 7a8b340ad2)

pyproject.toml

@@ -316,10 +316,6 @@ dev = [
 no-binary-package = ["lxml", "xmlsec"]
 
 [tool.uv.sources]
-# https://github.com/typeddjango/django-stubs/pull/2738
-django-stubs = { url = "https://github.com/typeddjango/django-stubs/archive/9b2a9e83ee31dfd3de34a361e6098926014b599b.zip" }
-django-stubs-ext = { url = "https://github.com/typeddjango/django-stubs/archive/9b2a9e83ee31dfd3de34a361e6098926014b599b.zip", subdirectory = "ext" }
-
 # Forked to avoid pulling in scipy: https://github.com/mailgun/talon/pull/200
 # and chardet, cchardet: https://github.com/mailgun/talon/pull/239
 # and fix invalid escape sequences: https://github.com/mailgun/talon/pull/245
@@ -335,7 +331,7 @@ zulip = { url = "https://github.com/zulip/python-zulip-api/archive/9e131ac626976
 zulip-bots = { url = "https://github.com/zulip/python-zulip-api/archive/0.9.0.zip", subdirectory = "zulip_bots" }
 
 # zulip's linting framework - zulint
-zulint = { url = "https://github.com/zulip/zulint/archive/9be0a32bf75a9d8738b005f0b880567fff64e943.zip" }
+zulint = { url = "https://github.com/zulip/zulint/archive/448e36a1e50e79c82257ed3d65fcf5c8591cdb61.zip" }
 
 [tool.black]
 line-length = 100

version.py

@@ -49,4 +49,4 @@ API_FEATURE_LEVEL = 421
 #   historical commits sharing the same major version, in which case a
 #   minor version bump suffices.
 
-PROVISION_VERSION = (340, 3)  # bumped 2025-08-13 to upgrade uv
+PROVISION_VERSION = (340, 4)  # bumped 2025-08-13 to upgrade Python requirements