chore(deps-dev): bump certifi from 2025.8.3 to 2026.5.20

Bumps [certifi](https://github.com/certifi/python-certifi) from 2025.8.3 to 2026.5.20.
- [Commits](certifi/python-certifi@2025.08.03...2026.05.20)

---
updated-dependencies:
- dependency-name: certifi
  dependency-version: 2026.5.20
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -8,7 +8,7 @@ azure-core==1.41.0
 azure-identity==1.25.3
 build==1.4.3
 bumpver==2025.1131
-certifi==2025.8.3
+certifi==2026.5.20
 cffi==2.0.0
 charset-normalizer==3.4.7
 click==8.1.8