Bump sphinx from 4.0.0 to 4.0.1 (#788)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 4.0.0 to 4.0.1.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/4.x/CHANGES)
- [Commits](https://github.com/sphinx-doc/sphinx/compare/v4.0.0...v4.0.1)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

poetry.lock

@@ -573,7 +573,7 @@ python-versions = "*"
 
 [[package]]
 name = "sphinx"
-version = "4.0.0"
+version = "4.0.1"
 description = "Python documentation generator"
 category = "dev"
 optional = false
@@ -1202,8 +1202,8 @@ snowballstemmer = [
     {file = "snowballstemmer-2.1.0.tar.gz", hash = "sha256:e997baa4f2e9139951b6f4c631bad912dfd3c792467e2f03d7239464af90e914"},
 ]
 sphinx = [
-    {file = "Sphinx-4.0.0-py3-none-any.whl", hash = "sha256:904e02cd0f84bed5d3748358c228ae3df3ad725b9e6cdc2166e17b309ed2e1fa"},
-    {file = "Sphinx-4.0.0.tar.gz", hash = "sha256:b246ebd74f5fb966d7e90086bbda5ed74ee4d30b4c3cbefddc1fb5210aa317c7"},
+    {file = "Sphinx-4.0.1-py3-none-any.whl", hash = "sha256:b2566f5f339737a6ef37198c47d56de1f4a746c722bebdb2fe045c34bfd8b9d0"},
+    {file = "Sphinx-4.0.1.tar.gz", hash = "sha256:cf5104777571b2b7f06fa88ee08fade24563f4a0594cf4bd17d31c47b8740b4c"},
 ]
 sphinx-rtd-theme = [
     {file = "sphinx_rtd_theme-0.5.2-py2.py3-none-any.whl", hash = "sha256:4a05bdbe8b1446d77a01e20a23ebc6777c74f43237035e76be89699308987d6f"},