a739ca6 docs: Update CommBlog publishing instructions for event reports

Authored and Committed by jflory7 a year ago
    docs: Update CommBlog publishing instructions for event reports
    
    Previously, the docs asked individuals to sign up on the CommBlog
    mailing list and request a review on the list. However, the mailing list
    was deprecated and reviews now happen on Discourse.
    
    However, this might change again as @bcotton was considering to move
    this a Pagure ticket-based system. To future-proof this change, I
    changed the instructions to point at the CommBlog page on how to write
    an article. This way, if @bcotton moves to Pagure for handling reviews,
    these docs shouldn't need to be updated again.