pin more doc building related versions

Author: jcapriot

.ci/environment_test.yml

@@ -14,8 +14,8 @@ dependencies:
   # documentation
   - sphinx==8.2.3
   - pydata-sphinx-theme==0.16.1
-  - sphinx-gallery>=0.1.13
-  - numpydoc>=1.5
+  - sphinx-gallery==0.19.0
+  - numpydoc==1.9.0
   - jupyter
   - graphviz
   - pillow

pyproject.toml

@@ -61,10 +61,10 @@ viz = ["vtk>=6", "pyvista"]
 omf = ["omf"]
 all = ["discretize[plot,viz,omf]"]
 doc = [
-    "sphinx!=4.1.0",
-    "pydata-sphinx-theme==0.15.4",
-    "sphinx-gallery==0.1.13",
-    "numpydoc>=1.5",
+    "sphinx==8.2.3",
+    "pydata-sphinx-theme==0.16.1",
+    "sphinx-gallery==0.19.0",
+    "numpydoc==1.9.0",
     "jupyter",
     "graphviz",
     "pillow",