Bump sphinx from 6.1.2 to 6.1.3 (#177)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 6.1.2 to 6.1.3.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES)
- [Commits](sphinx-doc/sphinx@v6.1.2...v6.1.3)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Roberto Pastor Muela <roberto.pastormuela@ansys.com>

pyproject.toml

@@ -33,7 +33,7 @@ dependencies = [
 [project.optional-dependencies]
 doc = [
     "numpydoc==1.5.0",
-    "Sphinx==6.1.2",
+    "Sphinx==6.1.3",
     "sphinx-copybutton==0.5.1",
     "sphinx-notfound-page==0.8.3",
 ]