Fix author key casing on Semina Verbi post

The author field was JohnRDOrazio but the authors map in _config.yml
uses lowercase johnrdorazio, so Jekyll couldn't resolve the author
info on the post page.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: 2 people

_posts/2020-10-12-encyclopedia-influence-gospel-human-culture.md

@@ -3,7 +3,7 @@ layout: post
 title:  "Semina Verbi: an online encylopedia of the influence of the Gospel on human culture"
 date:   2020-10-12 15:56:00 +0200
 categories: [bible, evangelization, culture]
-author: JohnRDOrazio
+author: johnrdorazio
 comments: true
 ---