Pinning sphinx

Author: mEngstroem

pyproject.toml

@@ -60,7 +60,7 @@ dev = [
 docs = [
     "myst_parser==4.0.1",
     "nbsphinx==0.9.7",
-    "sphinx<8.2",
+    "sphinx==8.1.3",
     "sphinx_autodoc_typehints",
     "sphinx-book-theme==1.1.4",
     "sphinx-copybutton==0.5.2",