What is the proper name to call "non-developer bloggers"?

The option that comes to mind, focusing on what they actually do, is content creators. This is a pretty common term these days.

Here are a few examples:

The 5 Habits of Highly Successful Content Creators
What Type Of Content Creator Are You? A Visual Guide To Your Copywriting Identity
The Unstoppable Rise of the Digital Content Creator

Another option would be blog authors -- that's what I was called back when I did that for a living.

Focus on labelling your content rather than who may be viewing it. Idioms such as “101” or “best practise” may be appropriate.

My suggestion:

non-developer bloggers

Or

non-coding bloggers

Or

"WYSIWYG" bloggers

WYSIWYG is an acronym that means "what you see is what is what you get" and is a common term for modern "make your own website" and various other editors.