pip dev(deps-dev): update readthedocs-sphinx-ext requirement

Updates the requirements on [readthedocs-sphinx-ext](https://github.com/readthedocs/readthedocs-sphinx-ext) to permit the latest version.
- [Commits](readthedocs/readthedocs-sphinx-ext@0.5.3...2.2.2)

---
updated-dependencies:
- dependency-name: readthedocs-sphinx-ext
  dependency-type: direct:development
...

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

setup.py

@@ -33,7 +33,7 @@
             "nbsphinx<=0.9.1",
             "sphinx-autodoc-typehints<=1.23.0",
             "sphinx_rtd_theme<=1.2.0",
-            "readthedocs-sphinx-ext<=2.2.0",
+            "readthedocs-sphinx-ext<=2.2.2",
             "recommonmark<=0.7.1",
         ]
     },