Fix community page

[lwasser]

I am not sure how this happened but i had to fix the following things

• @willingc somehow was removed from the advisory board in the contributors.yml file. so odd. i'll keep an eye on this to ensure our automated update of this file isn't overwriting things inadvertently. or perhaps i did it inadvertently in a pr working too quickly?
• adding @kierisi to the website as community manager!!
• Fix of the styles for advisory listing so things are more clean!

[willingc]

Great plan to @kierisi. :smile: