Update sphinx-autodoc-typehints requirement from ~=3.0.1 to ~=3.1.0

Updates the requirements on [sphinx-autodoc-typehints](https://github.com/tox-dev/sphinx-autodoc-typehints) to permit the latest version.
- [Release notes](https://github.com/tox-dev/sphinx-autodoc-typehints/releases)
- [Commits](tox-dev/sphinx-autodoc-typehints@3.0.1...3.1.0)

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

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

Author: dependabot[bot]

pyproject.toml

@@ -122,7 +122,7 @@ docs = [
     "myst-parser ~= 4.0.0",
     # Sphinx 8 is the first version to drop Python 3.9.
     "sphinx ~= 8.1.3",
-    "sphinx-autodoc-typehints ~= 3.0.1",
+    "sphinx-autodoc-typehints ~= 3.1.0",
     "sphinx-copybutton ~= 0.5.2",
     "sphinx-design ~= 0.6.0",
     "sphinx-issues ~= 5.0.0",