Refs #32720 -- Updated various links in docs to avoid redirects and use HTTPS.

docs/intro/contributing.txt

@@ -343,7 +343,7 @@ This test checks that the ``make_toast()`` returns ``'toast'``.
     * After reading those, if you want something a little meatier to sink
       your teeth into, there's always the Python :mod:`unittest` documentation.
 
-__ https://www.diveinto.org/python3/unit-testing.html
+__ https://diveinto.org/python3/unit-testing.html
 
 Running your new test
 ---------------------

docs/intro/index.txt

@@ -34,7 +34,7 @@ place: read this material to quickly get up and running.
     Python quickly, we recommend `Dive Into Python`_. If that's not quite your
     style, there are many other `books about Python`_.
 
-    .. _python: https://python.org/
+    .. _python: https://www.python.org/
     .. _list of Python resources for non-programmers: https://wiki.python.org/moin/BeginnersGuide/NonProgrammers
     .. _Dive Into Python: https://diveinto.org/python3/table-of-contents.html
     .. _books about Python: https://wiki.python.org/moin/PythonBooks

docs/intro/install.txt

@@ -14,7 +14,7 @@ Being a Python Web framework, Django requires Python. See
 :ref:`faq-python-version-support` for details. Python includes a lightweight
 database called SQLite_ so you won't need to set up a database just yet.
 
-.. _sqlite: https://sqlite.org/
+.. _sqlite: https://www.sqlite.org/
 
 Get the latest version of Python at https://www.python.org/downloads/ or with
 your operating system's package manager.

docs/intro/tutorial03.txt

@@ -212,7 +212,7 @@ Put the following code in that template:
     To make the tutorial shorter, all template examples use incomplete HTML. In
     your own projects you should use `complete HTML documents`__.
 
-__ https://developer.mozilla.org/en-US/docs/Learn/HTML/Introduction_to_HTML/Getting_started#Anatomy_of_an_HTML_document
+__ https://developer.mozilla.org/en-US/docs/Learn/HTML/Introduction_to_HTML/Getting_started#anatomy_of_an_html_document
 
 Now let's update our ``index`` view in ``polls/views.py`` to use the template:
 

docs/intro/tutorial05.txt

@@ -689,7 +689,7 @@ Coverage will help to identify dead code. See
 :doc:`Testing in Django </topics/testing/index>` has comprehensive
 information about testing.
 
-.. _Selenium: http://seleniumhq.org/
+.. _Selenium: https://www.selenium.dev/
 .. _continuous integration: https://en.wikipedia.org/wiki/Continuous_integration
 
 What's next?