Update SciPy doc reference path

As noted in scipy/scipy#15545 the object
inventory has moved. Though there's a redirect, it has paths like
`reference/..` which doubles the `reference` in the URL.

Author: QuLogic

doc/conf.py

@@ -160,7 +160,7 @@ def _check_dependencies():
     'pandas': ('https://pandas.pydata.org/pandas-docs/stable/', None),
     'pytest': ('https://pytest.org/en/stable/', None),
     'python': ('https://docs.python.org/3/', None),
-    'scipy': ('https://docs.scipy.org/doc/scipy/reference/', None),
+    'scipy': ('https://docs.scipy.org/doc/scipy/', None),
     'tornado': ('https://www.tornadoweb.org/en/stable/', None),
     'xarray': ('https://xarray.pydata.org/en/stable/', None),
 }
@@ -191,7 +191,7 @@ def matplotlib_reduced_latex_scraper(block, block_vars, gallery_conf,
     'reference_url': {
         'matplotlib': None,
         'numpy': 'https://numpy.org/doc/stable/',
-        'scipy': 'https://docs.scipy.org/doc/scipy/reference/',
+        'scipy': 'https://docs.scipy.org/doc/scipy/',
     },
     'backreferences_dir': Path('api') / Path('_as_gen'),
     'subsection_order': gallery_order.sectionorder,

doc/devel/documenting_mpl.rst

@@ -307,7 +307,7 @@ commands::
 
   python -m sphinx.ext.intersphinx 'https://docs.python.org/3/objects.inv'
   python -m sphinx.ext.intersphinx 'https://numpy.org/doc/stable/objects.inv'
-  python -m sphinx.ext.intersphinx 'https://docs.scipy.org/doc/scipy/reference/objects.inv'
+  python -m sphinx.ext.intersphinx 'https://docs.scipy.org/doc/scipy/objects.inv'
   python -m sphinx.ext.intersphinx 'https://pandas.pydata.org/pandas-docs/stable/objects.inv'
 
 .. _rst-figures-and-includes: