MAINT: Update sphinx requirement from <8.1,>=7.1.0 to >=7.1.0,<8.2

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/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v7.1.0...v8.1.0)

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

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

pyproject.toml

@@ -52,7 +52,7 @@ doc = [
     "PySide6-Essentials",
     "ansys-sphinx-theme>=0.10.0,<1.1",
     "numpydoc>=1.5.0,<1.9",
-    "Sphinx>=7.1.0,<8.1",
+    "Sphinx>=7.1.0,<8.2",
     "sphinx-copybutton>=0.5.0,<0.6",
     "sphinx-autobuild==2021.3.14; python_version == '3.8'",
     "sphinx-autobuild==2024.10.3; python_version > '3.8'",