Black Vinyl Ale Project in Rocklin has been sold, and will debut next month as Kathrin's Biergarten. The owners of Black Vinyl, a brewery and restaurant, announced the sale in a Facebook post on Saturday. "At a time we felt we were ready to take a break and slow down a little, we found someone who had an equal passion for great beer who wanted to bring a touch of her heritage in the form of a traditional German Biergarten and our location and operation served that perfectly," it says. Kathrin…