Bump certifi from 2026.1.4 to 2026.2.25

Bumps [certifi](https://github.com/certifi/python-certifi) from 2026.1.4 to 2026.2.25.
- [Commits](certifi/python-certifi@2026.01.04...2026.02.25)

---
updated-dependencies:
- dependency-name: certifi
  dependency-version: 2026.2.25
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -4,7 +4,7 @@ attrs==25.4.0
 Babel==2.17.0
 beautifulsoup4==4.14.3
 breathe==4.36.0
-certifi==2026.1.4
+certifi==2026.2.25
 colorama==0.4.6
 Cython==3.2.4
 docutils==0.21.2