Add note about buggy github rendering

The documents are correct and HTML/PDF end results look fine.

Author: dannyadair

README.md

@@ -12,8 +12,10 @@ authoritative source code of the documents and tracks changes to them.
 ### Constitution
 
 This is Markdown source code to produce HTML (for https://python.nz) and PDF (for
-printing)<br> _Note: On github.com, bullet points will show in addition to numbering
-(styling is ignored)_
+printing)<br> \_Note: On github.com, bullet points will show in addition to numbering
+(styling is ignored). Also, clauses following a bullet list wrongly remain at the same
+indentation level as the bullet list - this seems to be a rendering bug in github. The
+HTML/PDF results look fine.
 
 #### Create HTML