Update certifi requirement from >=2022.12.7 to >=2026.4.22

Updates the requirements on [certifi](https://github.com/certifi/python-certifi) to permit the latest version.
- [Commits](certifi/python-certifi@2022.12.07...2026.04.22)

---
updated-dependencies:
- dependency-name: certifi
  dependency-version: 2026.4.22
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,3 +1,3 @@
 requests>=2,<3
 marshmallow_dataclass>=8
-certifi>=2022.12.7 # not directly required, pinned by Snyk to avoid a vulnerability
+certifi>=2026.4.22 # not directly required, pinned by Snyk to avoid a vulnerability