Update sphinx requirement from 4.4.0 to 4.5.0

Updates the requirements on [sphinx](https://github.com/sphinx-doc/sphinx) to permit the latest version.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/4.x/CHANGES)
- [Commits](sphinx-doc/sphinx@v4.4.0...v4.5.0)

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

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

pyproject.toml

@@ -58,7 +58,7 @@ ipython = { version = "7.32.0", optional = true }
 # Doc packages
 pyansys-sphinx-theme = { version = "0.2.3", optional = true }
 numpydoc = { version = "1.2", optional = true }
-sphinx = { version = "4.4.0", optional = true }
+sphinx = { version = "4.5.0", optional = true }
 sphinx_autodoc_typehints = { version = "1.14.1", optional = true }
 sphinx-notfound-page = { version = "0.8", optional = true }
 sphinx-copybutton = { version = "0.5.0", optional = true }