8.1.3 is last to support python 3.10

Author: jcapriot

.ci/environment_test.yml

@@ -12,7 +12,7 @@ dependencies:
   - matplotlib
 
   # documentation
-  - sphinx==8.2.3
+  - sphinx==8.1.3
   - pydata-sphinx-theme==0.16.1
   - sphinx-gallery==0.19.0
   - numpydoc==1.9.0

pyproject.toml

@@ -61,7 +61,7 @@ viz = ["vtk>=6", "pyvista"]
 omf = ["omf"]
 all = ["discretize[plot,viz,omf]"]
 doc = [
-    "sphinx==8.2.3",
+    "sphinx==8.1.3",
     "pydata-sphinx-theme==0.16.1",
     "sphinx-gallery==0.19.0",
     "numpydoc==1.9.0",