build(deps): bump certifi from 2025.1.31 to 2025.4.26 in /docs

Bumps [certifi](https://github.com/certifi/python-certifi) from 2025.1.31 to 2025.4.26.
- [Commits](certifi/python-certifi@2025.01.31...2025.04.26)

---
updated-dependencies:
- dependency-name: certifi
  dependency-version: 2025.4.26
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs/requirements.txt

@@ -18,9 +18,9 @@ babel==2.17.0 \
     --hash=sha256:0c54cffb19f690cdcc52a3b50bcbf71e07a808d1c80d549f2459b9d2cf0afb9d \
     --hash=sha256:4d0b53093fdfb4b21c92b5213dba5a1b23885afa8383709427046b21c366e5f2
     # via sphinx
-certifi==2025.1.31 \
-    --hash=sha256:3d5da6925056f6f18f119200434a4780a94263f10d1c21d032a6f6b2baa20651 \
-    --hash=sha256:ca78db4565a652026a4db2bcdf68f2fb589ea80d0be70e03929ed730746b84fe
+certifi==2025.4.26 \
+    --hash=sha256:0a816057ea3cdefcef70270d2c515e4506bbc954f417fa5ade2021213bb8f0c6 \
+    --hash=sha256:30350364dfe371162649852c63336a15c70c6510c2ad5015b21c2345311805f3
     # via requests
 charset-normalizer==3.4.1 \
     --hash=sha256:0167ddc8ab6508fe81860a57dd472b2ef4060e8d378f0cc555707126830f2537 \