chore(deps): bump certifi from 2026.1.4 to 2026.2.25 in /hack/api-docs (#6013)

Bumps [certifi](https://github.com/certifi/python-certifi) from 2026.1.4 to 2026.2.25.
- [Commits](https://github.com/certifi/python-certifi/compare/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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

hack/api-docs/requirements.txt

@@ -1,5 +1,5 @@
 Babel==2.18.0
-certifi==2026.1.4
+certifi==2026.2.25
 charset-normalizer==3.4.4
 click==8.3.1
 colorama==0.4.6