bpo-32440: Update the docs URL to https in help() (GH-5030) (GH-5031)

In pydoc.py, the reference to Python' documentation was in http.
The link has been updated to use https.
(cherry picked from commit e5681b9)

Lib/pydoc.py

@@ -1916,7 +1916,7 @@ def intro(self):
 Welcome to Python {0}'s help utility!
 
 If this is your first time using Python, you should definitely check out
-the tutorial on the Internet at http://docs.python.org/{0}/tutorial/.
+the tutorial on the Internet at https://docs.python.org/{0}/tutorial/.
 
 Enter the name of any module, keyword, or topic to get help on writing
 Python programs and using Python modules.  To quit this help utility and