Update CREDITS.md
Update CREDITS.md

New contributors added since last update:
git log --format="%aN" b92bdaf6327c93247bea496a4dca5bbc0364c12a..HEAD | sort

GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver