DOC: Update intersphinx mapping

Author: effigies

docs/conf.py

@@ -335,10 +335,10 @@
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
-    "python": ("https://docs.python.org/", None),
-    "numpy": ("http://docs.scipy.org/doc/numpy", None),
-    "scipy": ("http://docs.scipy.org/doc/scipy/reference", None),
-    "matplotlib": ("http://matplotlib.sourceforge.net", None),
+    "python": ("https://docs.python.org/3/", None),
+    "numpy": ("https://docs.scipy.org/doc/numpy", None),
+    "scipy": ("https://docs.scipy.org/doc/scipy/reference", None),
+    "matplotlib": ("https://matplotlib.org/", None),
     "bids": ("https://bids-standard.github.io/pybids/", None),
     "nibabel": ("https://nipy.org/nibabel/", None),
     "nipype": ("https://nipype.readthedocs.io/en/latest/", None),