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:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -1,7 +1,7 @@
 -r requirements.txt
 attrs==25.4.0
 build==1.4.0
-certifi==2026.1.4
+certifi==2026.2.25
 colorama==0.4.6
 flake8==7.3.0
 iniconfig==2.1.0