build(deps): bump the production-dependencies group across 1 directory with 2 updates

Bumps the production-dependencies group with 2 updates in the /docs directory: [certifi](https://github.com/certifi/python-certifi) and [snowballstemmer](https://github.com/snowballstem/snowball).


Updates `certifi` from 2025.1.31 to 2025.4.26
- [Commits](certifi/python-certifi@2025.01.31...2025.04.26)

Updates `snowballstemmer` from 2.2.0 to 3.0.0
- [Changelog](https://github.com/snowballstem/snowball/blob/master/NEWS)
- [Commits](snowballstem/snowball@v2.2.0...v3.0.0)

---
updated-dependencies:
- dependency-name: certifi
  dependency-version: 2025.4.26
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production-dependencies
- dependency-name: snowballstemmer
  dependency-version: 3.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: production-dependencies
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -3,7 +3,7 @@ Jinja2==3.1.6
 MarkupSafe==3.0.2
 Pygments==2.19.1
 Sphinx==7.4.7
-certifi==2025.1.31
+certifi==2025.4.26
 chardet==5.2.0
 commonmark==0.9.1
 docutils==0.20.1
@@ -14,7 +14,7 @@ packaging==25.0
 pyparsing==3.2.3
 pytz==2025.2
 requests==2.32.3
-snowballstemmer==2.2.0
+snowballstemmer==3.0.0
 sphinx-favicon==1.0.1
 sphinx-rtd-theme==3.0.2
 sphinxcontrib-applehelp==2.0.0