build(deps): bump babel in /docs in the production-dependencies group

Bumps the production-dependencies group in /docs with 1 update: [babel](https://github.com/python-babel/babel).


Updates `babel` from 2.15.0 to 2.16.0
- [Release notes](https://github.com/python-babel/babel/releases)
- [Changelog](https://github.com/python-babel/babel/blob/master/CHANGES.rst)
- [Commits](python-babel/babel@v2.15.0...v2.16.0)

---
updated-dependencies:
- dependency-name: babel
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production-dependencies
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1,4 +1,4 @@
-Babel==2.15.0
+Babel==2.16.0
 Jinja2==3.1.4
 MarkupSafe==2.1.5
 Pygments==2.18.0