Bump docutils from 0.14 to 0.21.2 in /docs

Bumps [docutils](https://docutils.sourceforge.io) from 0.14 to 0.21.2.

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

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

Author: dependabot[bot]

docs/requirements.txt

@@ -2,7 +2,7 @@ alabaster==0.7.12
 Babel==2.16.0
 certifi==2024.7.4
 chardet==5.2.0
-docutils==0.14
+docutils==0.21.2
 idna==3.10
 imagesize==0.7.1
 Jinja2==3.1.4