Bump docutils from 0.17.1 to 0.18.1

Bumps [docutils](http://docutils.sourceforge.net/) from 0.17.1 to 0.18.1.

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

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

Author: dependabot[bot]

docs-requirements.txt

@@ -12,7 +12,7 @@ certifi==2021.10.8
     # via requests
 charset-normalizer==2.0.11
     # via requests
-docutils==0.17.1
+docutils==0.18.1
     # via sphinx
 idna==3.3
     # via requests

test-requirements.txt

@@ -22,7 +22,7 @@ coverage[toml]==6.1.1
     # via pytest-cov
 cssselect==1.1.0
     # via -r test-requirements.in
-docutils==0.17.1
+docutils==0.18.1
     # via sphinx
 idna==3.3
     # via requests