Bump sphinx-rtd-theme from 0.5.1 to 0.5.2

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 0.5.1 to 0.5.2.
- [Release notes](https://github.com/readthedocs/sphinx_rtd_theme/releases)
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@0.5.1...0.5.2)

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

Author: dependabot-preview[bot]

poetry.lock

@@ -30,7 +30,7 @@ jsonschema = "^3.2.0"
 pylint = "^2.7.2"
 sphinx = "^3.5.3"
 sphinx-autoapi = "^1.7.0"
-sphinx-rtd-theme = "^0.5.1"
+sphinx-rtd-theme = "^0.5.2"
 mypy = "^0.812"
 
 [tool.black]