Update links in quickstart template to save redirects

sphinx/templates/quickstart/conf.py_t

@@ -2,7 +2,7 @@
 #
 # This file only contains a selection of the most common options. For a full
 # list see the documentation:
-# http:https://www.sphinx-doc.org/en/master/config
+# https:https://www.sphinx-doc.org/en/master/usage/configuration.html
 
 # -- Path setup --------------------------------------------------------------
 
@@ -105,7 +105,7 @@ html_static_path = ['{{ dot }}static']
 # -- Options for intersphinx extension ---------------------------------------
 
 # Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {'https://docs.python.org/': None}
+intersphinx_mapping = {'https://docs.python.org/3/': None}
 {%- endif %}
 {%- if 'sphinx.ext.todo' in extensions %}
 
@@ -114,4 +114,3 @@ intersphinx_mapping = {'https://docs.python.org/': None}
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = True
 {%- endif %}
-