chore(deps-dev): bump certifi from 2025.8.3 to 2026.10.18

Bumps [certifi](https://github.com/certifi/python-certifi) from 2025.8.3 to 2026.10.18.
- [Commits](certifi/python-certifi@2025.08.03...2026.10.18)

---
updated-dependencies:
- dependency-name: certifi
  dependency-version: 2026.10.19
  dependency-type: direct:development
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -13,7 +13,7 @@ build==1.3.0
 
 bumpver==2025.1131
 
-certifi==2025.8.3 ; python_version >= '3.6'
+certifi==2026.10.18 ; python_version >= '3.6'
 
 cffi==1.17.1 ; os_name == 'nt' and implementation_name != 'pypy'