chore(deps): bump certifi from 2025.4.26 to 2025.6.15

Bumps [certifi](https://github.com/certifi/python-certifi) from 2025.4.26 to 2025.6.15.
- [Commits](https://github.com/certifi/python-certifi/compare/2025.04.26...2025.06.15)

---
updated-dependencies:
- dependency-name: certifi
  dependency-version: 2025.6.15
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -18,7 +18,7 @@ humanize==4.12.3
 cachetools==6.0.0
 requests==2.32.4
 urllib3==2.4.0
-certifi==2025.4.26
+certifi==2025.6.15
 jsonschema==4.24.0
 tabulate==0.9.0
 pycoingecko==3.2.0