Bump certifi from 2025.11.12 to 2026.1.4 (#1473)

Bumps [certifi](https://github.com/certifi/python-certifi) from 2025.11.12 to 2026.1.4.
- [Commits](certifi/python-certifi@2025.11.12...2026.01.04)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements-dev.txt

@@ -4,7 +4,7 @@ autograd==1.8.0 ; python_version >= "3.11" and python_version < "3.15"
 autopep8==2.3.2 ; python_version >= "3.11" and python_version < "3.15"
 bayesian-filters==1.4.5 ; python_version >= "3.11" and python_version < "3.15"
 beartype==0.22.9 ; python_version >= "3.11" and python_version < "3.15"
-certifi==2025.11.12 ; python_version >= "3.11" and python_version < "3.15"
+certifi==2026.1.4 ; python_version >= "3.11" and python_version < "3.15"
 charset-normalizer==3.4.4 ; python_version >= "3.11" and python_version < "3.15"
 colorama==0.4.6 ; python_version >= "3.11" and python_version < "3.15" and (sys_platform == "win32" or platform_system == "Windows")
 contourpy==1.3.3 ; python_version >= "3.11" and python_version < "3.15"

requirements.txt

@@ -2,7 +2,7 @@ astropy-iers-data==0.2026.1.5.0.43.43 ; python_version >= "3.11" and python_vers
 astropy==7.2.0 ; python_version >= "3.11" and python_version < "3.15"
 bayesian-filters==1.4.5 ; python_version >= "3.11" and python_version < "3.15"
 beartype==0.22.9 ; python_version >= "3.11" and python_version < "3.15"
-certifi==2025.11.12 ; python_version >= "3.11" and python_version < "3.15"
+certifi==2026.1.4 ; python_version >= "3.11" and python_version < "3.15"
 charset-normalizer==3.4.4 ; python_version >= "3.11" and python_version < "3.15"
 colorama==0.4.6 ; python_version >= "3.11" and python_version < "3.15" and platform_system == "Windows"
 contourpy==1.3.3 ; python_version >= "3.11" and python_version < "3.15"