Bump sphinx-rtd-theme from 1.0.0 to 1.1.1

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 1.0.0 to 1.1.1.
- [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@1.0.0...1.1.1)

---
updated-dependencies:
- dependency-name: sphinx-rtd-theme
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -34,7 +34,7 @@ ECPy = "^1.2.5"
 
 [tool.poetry.dev-dependencies]
 Sphinx = "^4.3.2"
-sphinx-rtd-theme = "^1.0.0"
+sphinx-rtd-theme = "^1.1.1"
 pytest = "^7.2.0"
 pytest-cov = "^4.0.0"
 flake8 = "^5.0.4"