Fix class' news markdown.
Fix class' news markdown.

Reported here: https://lichess.org/forum/lichess-feedback/markdown-headers-stopped-working#1

luanlv/lila,arex1337/lila,arex1337/lila,arex1337/lila,arex1337/lila,arex1337/lila,arex1337/lila,luanlv/lila,arex1337/lila,luanlv/lila,luanlv/lila,luanlv/lila,luanlv/lila,luanlv/lila