[3.14] gh-139588: Increase maximum LaTeX list depth (GH-140709) (#140724)

Co-authored-by: Maciej Olko <maciej.olko@affirm.com>
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>

Doc/conf.py

@@ -359,6 +359,7 @@ latex_elements = {
     'papersize': 'a4paper',
     # The font size ('10pt', '11pt' or '12pt').
     'pointsize': '10pt',
+    'maxlistdepth': '8',  # See https://github.com/python/cpython/issues/139588
 }
 
 # Grouping the document tree into LaTeX files. List of tuples