Update Intersphinx links for requests.

docs/conf.py

@@ -380,7 +380,7 @@ def tag2version(tag):
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
 	'python': ('https://docs.python.org/3.8', None),
-	'requests': ('https://docs.python-requests.org/en/master/', None),
+	'requests': ('https://requests.readthedocs.io/en/latest/', None),
 }
 
 autoclass_content = "class"