Documentation doesn't mention markdown-it-py

[furicle]

Just trying this for the first time. The documentation seems to make some assumptions that aren't obvious to a new user (me).

1 - Won't work as mentioned on Windows. This wasn't surprising, but perhaps a mention of Windows and requiring python to be installed and on path, and running python.exe manpageblog instead

2 - The one I wasn't expecting - the warning WARNING: Cannot render Markdown in content/blog\2024-06-06-manpageblog-release-1.4.md: No module named 'markdown_it'
If it's not a show stopper (which 'warning' implies), then the docs might tell people it will happen and it's ok to proceed.
If it is a show stopper, we need instructions how to install the module. Note the fact the module isn't called markdown_it is confusing too....