build(deps): 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]

pyproject.toml

@@ -45,7 +45,7 @@ classifiers = [
 
 dependencies = [
     "argcomplete==3.6.3",
-    "certifi==2026.4.22",
+    "certifi==2026.5.20",
     "defusedxml==0.7.1",
     "jsonschema==4.25.1",
     "matplotlib==3.9.4; python_version < '3.10'",