Build(deps): Bump certifi in /dependencies/docs

Bumps [certifi](https://github.com/certifi/python-certifi) from 2025.4.26 to 2025.6.15.
- [Commits](certifi/python-certifi@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] <[email protected]>

Author: dependabot[bot]

dependencies/docs/constraints.txt

@@ -1,6 +1,6 @@
 alabaster==0.7.16
 Babel==2.17.0
-certifi==2025.4.26
+certifi==2025.6.15
 charset-normalizer==3.4.2
 docutils==0.21.2
 idna==3.10