Python dependency: Bump certifi from 2026.4.22 to 2026.5.20

Bumps [certifi](https://github.com/certifi/python-certifi) from 2026.4.22 to 2026.5.20.
- [Commits](certifi/python-certifi@2026.04.22...2026.05.20)

---
updated-dependencies:
- dependency-name: certifi
  dependency-version: 2026.5.20
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -21,7 +21,7 @@ azure-mgmt-subscription==3.1.1
 bcrypt==5.0.*
 boto3==1.42.*; python_version <= '3.9'
 boto3==1.43.*; python_version > '3.9'
-certifi==2026.4.22
+certifi==2026.5.20
 cryptography==48.0.*
 Flask-Babel==4.0.*
 Flask-Compress==1.*