upgrade sphinx

Author: cspotcode

pyproject.toml

@@ -50,7 +50,7 @@ dev = [
     "furo",
     "pyright",
     "pyyaml==6.0",
-    "sphinx==7.0.1",
+    "sphinx==7.1.2",
     "sphinx-autobuild==2021.3.14",
     "sphinx-copybutton==0.5.2",
     # Intentionally kept at 2.3 until this bugfix is published: https://github.com/jdillard/sphinx-sitemap/pull/62