COMP: Bump sphinx version

Other dependencies fail to install with the old version.

Also bump the superbuild itkwidgets version.

Author: thewtex

.github/workflows/build-test-publish.yml

@@ -291,7 +291,7 @@ jobs:
 
           python -m pip install --upgrade pip
           python -m pip install ninja
-          python -m pip install 'sphinx==4.4.0' 'docutils<0.18'
+          python -m pip install 'sphinx==7.2.6'
           python -m pip install --ignore-installed six
           python -m pip install ipython
 

Superbuild/External-Python.cmake

@@ -17,6 +17,6 @@ ExternalProject_Add(ITKPython
   DOWNLOAD_COMMAND ""
   CONFIGURE_COMMAND ${PYTHON_EXECUTABLE} -m venv "${_itk_venv}"
   BUILD_COMMAND ${ITKPYTHON_EXECUTABLE} -m pip install --upgrade pip
-  INSTALL_COMMAND ${ITKPYTHON_EXECUTABLE} -m pip install --ignore-installed itk>=5.4rc3 sphinx==4.4.0 docutils<0.18 traitlets==5.6.0 six black nbsphinx ipywidgets sphinx-contributors ipykernel matplotlib itkwidgets[lab,notebook]>=1.0a21 pydata-sphinx-theme
+  INSTALL_COMMAND ${ITKPYTHON_EXECUTABLE} -m pip install --ignore-installed itk>=5.4rc3 sphinx==7.2.6 six black nbsphinx ipywidgets sphinx-contributors ipykernel matplotlib itkwidgets[lab,notebook]>=1.0a49 pydata-sphinx-theme
   COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/ITKBlackConfig.cmake
   )