build(deps): bump the production-dependencies group across 1 directory with 2 updates (#4527)

Bumps the production-dependencies group with 2 updates in the /docs directory: [certifi](https://github.com/certifi/python-certifi) and [pytz](https://github.com/stub42/pytz).


Updates `certifi` from 2026.6.17 to 2026.7.22
- [Commits](certifi/python-certifi@2026.06.17...2026.07.22)

Updates `pytz` from 2026.2 to 2026.3.post1
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](stub42/pytz@release_2026.2...release_2026.3.post1)

---
updated-dependencies:
- dependency-name: certifi
  dependency-version: 2026.7.22
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production-dependencies
- dependency-name: pytz
  dependency-version: 2026.3.post1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/requirements.txt

@@ -3,7 +3,7 @@ Jinja2==3.1.6
 MarkupSafe==3.0.3
 Pygments==2.20.0
 Sphinx==8.2.3
-certifi==2026.6.17
+certifi==2026.7.22
 chardet==7.4.3
 commonmark==0.9.2
 docutils==0.20.1
@@ -12,7 +12,7 @@ imagesize==2.0.0
 myst-parser==5.1.0 
 packaging==26.2
 pyparsing==3.3.2
-pytz==2026.2
+pytz==2026.3.post1
 requests==2.34.2
 snowballstemmer==3.1.1
 sphinx-favicon==1.1.0