Update docutils requirement from <0.20,>=0.10 to >=0.21.2,<0.22

Updates the requirements on [docutils](https://docutils.sourceforge.io) to permit the latest version.

---
updated-dependencies:
- dependency-name: docutils
  dependency-type: direct:production
...

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

pyproject.toml

@@ -29,7 +29,7 @@ classifiers = [
 ]
 dependencies = [
     "colorama>=0.2.5,<0.4.7",
-    "docutils>=0.10,<0.20",
+    "docutils>=0.21.2,<0.22",
     "cryptography>=3.3.2,<40.0.2",
     "ruamel.yaml>=0.15.0,<=0.17.21",
     # ruamel.yaml only requires ruamel.yaml.clib for Python versions