update some old refs to 3.11

Author: hjwp

pre-requisite-installations.asciidoc

@@ -162,6 +162,8 @@ image::images/git_windows_installer_choose_editor.png["Screenshot of Git install
 .Add Python to the system path from the installer
 image::images/python_install_add_to_path.png["Screenshot of python installer"]
 
+// TODO: update screenshot above for 3.12
+
 The test for all this is that you should be able to go to a Git-Bash command prompt
 and just run `python` or `pip` from any folder.
 

preface.asciidoc

@@ -43,12 +43,11 @@ either via www.obeythetestinggoat.com, or via the O'Reilly Learning site.
 Congratulations!
 
 At the time of writing, the whole of _Part 1_ of the book (the first 7 chapters),
-and the first chapter in Part 2 (chapter 8)
-have been updated for the third edition.
-They’ve been upgraded to Python 3.11, Django 4,
-and the text has been comprehensively reviewed.
+and the bulk of Part 2 (chapter 8-14) have been updated for the third edition.
+They’ve been upgraded to Python 3.12, Django 4,
+and the text up to chapter 12 has been comprehensively reviewed.
 
-_Chapters 9 and above are still on Python 3.7 / Django 1.x._
+_Chapters 15 and above are still on Python 3.7 / Django 1.x._
 
 If you're following through the code examples in rest of the book,
 you have two choices: