Fix image vs. font asset loading order

[migurski]

Looking at the issue finder over bad wifi, the issue names were displaying after the many Github user icons had loaded. They were unreadable for ~30 seconds. In the pattern library we’ve switched from Freight to browser-native Georgia to get rid of this problem, so it might just be a matter of updating the issue finder CSS to point to the right place, https://style.codeforamerica.org/style/css/main.css