[stubsabot] Bump pytz to 2026.1.post1 (#15483)

Author: github-actions[bot]

stubs/pytz/METADATA.toml

@@ -1,3 +1,3 @@
-version = "2025.2"
+version = "2026.1.post1"
 # This is a mirror of https://git.launchpad.net/pytz/tree, see https://pythonhosted.org/pytz/#latest-versions
 upstream_repository = "https://github.com/stub42/pytz"