chore(deps): update sphinx-argparse requirement from <0.5 to <0.6

Updates the requirements on [sphinx-argparse](https://github.com/sphinx-doc/sphinx-argparse) to permit the latest version.
- [Release notes](https://github.com/sphinx-doc/sphinx-argparse/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx-argparse/blob/main/docs/changelog.rst)
- [Commits](sphinx-doc/sphinx-argparse@0.1.1...v0.5.2)

---
updated-dependencies:
- dependency-name: sphinx-argparse
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -57,7 +57,7 @@ optional-dependencies.docs = [
   "pandoc",
   "requests",
   "sphinx",
-  "sphinx-argparse<0.5",
+  "sphinx-argparse<0.6",
   "sphinx-rtd-theme",
   "termcolor",
 ]