Bump sphinx pin and update intersphinx links

Author: dihm

docs/source/conf.py

@@ -79,15 +79,15 @@
 intersphinx_mapping = {
     'python': ('https://docs.python.org/3/', None),
     'numpy': ('https://numpy.org/doc/stable/', None),
-    'scipy': ('https://docs.scipy.org/doc/scipy/reference/', None),
+    'scipy': ('https://docs.scipy.org/doc/scipy/', None),
     'pandas': ('https://pandas.pydata.org/pandas-docs/stable/', None),
     'qtutils': ('https://qtutils.readthedocs.io/en/stable/', None),
     'pyqtgraph': (
         'https://pyqtgraph.readthedocs.io/en/latest/',
         None,
     ),  # change to stable once v0.11 is published
-    'matplotlib': ('https://matplotlib.org/', None),
-    'h5py': ('http://docs.h5py.org/en/stable/', None),
+    'matplotlib': ('https://matplotlib.org/stable/', None),
+    'h5py': ('https://docs.h5py.org/en/stable/', None),
     'pydaqmx': ('https://pythonhosted.org/PyDAQmx/', None),
     'qt': (
         '',

setup.cfg

@@ -35,7 +35,7 @@ install_requires =
 [options.extras_require]
 docs = 
   PyQt5
-  Sphinx==3.5.3
+  Sphinx==4.4.0
   sphinx-rtd-theme==0.5.2
   recommonmark==0.6.0
   m2r==0.2.1