Bump certifi from 2025.6.15 to 2026.1.4

Bumps [certifi](https://github.com/certifi/python-certifi) from 2025.6.15 to 2026.1.4.
- [Commits](certifi/python-certifi@2025.06.15...2026.01.04)

---
updated-dependencies:
- dependency-name: certifi
  dependency-version: 2026.1.4
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

constraints.txt

@@ -4,7 +4,7 @@ Babel==2.12.1
 backports.ssl-match-hostname==3.7.0.1
 bcrypt==4.3.0
 beautifulsoup4==4.13.4
-certifi==2025.6.15
+certifi==2026.1.4
 chardet==5.2.0
 charset-normalizer==3.4.2
 coverage==7.9.1