Bump docutils from 0.20.1 to 0.21.2

Bumps [docutils](https://docutils.sourceforge.io) from 0.20.1 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>

requirements.txt

@@ -60,7 +60,7 @@ defusedxml==0.7.1
     # via nbconvert
 deprecated==1.2.14
     # via opentelemetry-api
-docutils==0.20.1
+docutils==0.21.2
     # via
     #   nbsphinx
     #   sphinx