Python dependency: Update pytz requirement in /web/regression

Updates the requirements on [pytz](https://github.com/stub42/pytz) to permit the latest version.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](stub42/pytz@release_2025.1...release_2026.1.post1)

---
updated-dependencies:
- dependency-name: pytz
  dependency-version: 2026.1.post1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -47,7 +47,7 @@ psycopg[c]==3.2.13; python_version < '3.10'
 psycopg[c]==3.3.3; python_version >= '3.10'
 pyotp==2.*
 python-dateutil==2.*
-pytz==2025.*
+pytz==2026.*
 # pinned for https://github.com/andfoy/pywinpty/issues/545
 pywinpty==2.0.*; sys_platform=="win32"
 qrcode[pil]==8.*