build(deps): bump certifi from 2026.4.22 to 2026.5.20 (#219)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
-certifi==2026.4.22 ; python_version >= "3.10" and python_full_version < "3.15.0" \
-    --hash=sha256:3cb2210c8f88ba2318d29b0388d1023c8492ff72ecdde4ebdaddbb13a31b1c4a \
-    --hash=sha256:8d455352a37b71bf76a79caa83a3d6c25afee4a385d632127b6afb3963f1c580
+certifi==2026.5.20 ; python_version >= "3.10" and python_full_version < "3.15.0" \
+    --hash=sha256:3c52e209ba0a4ad7aebe60436a4ab349c39e1e602e8c134221e546902ad25897 \
+    --hash=sha256:69dea482ab64caa7b9f6aba1c6bf48bb6a5448d1c0f1b17ab42ad8c763a5344d
 charset-normalizer==3.4.7 ; python_version >= "3.10" and python_full_version < "3.15.0" \
     --hash=sha256:007d05ec7321d12a40227aae9e2bc6dca73f3cb21058999a1df9e193555a9dcc \
     --hash=sha256:03853ed82eeebbce3c2abfdbc98c96dc205f32a79627688ac9a27370ea61a49c \