build(deps): 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](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>

requirements.txt

@@ -3,7 +3,7 @@ arrow==1.4.0
 attrs==25.4.0
 backports.functools-lru-cache==2.0.0
 blurhash==1.1.5
-certifi==2026.1.4
+certifi==2026.2.25
 chardet==6.0.0.post1
 charset-normalizer==3.4.4
 colorama==0.4.6