A rising San Francisco human resources startup’s use of a blacklisted Chinese AI lab’s model is setting off alarm bells as Beijing continues to reel in American companies. Rippling touts itself as a one-stop-shop AI platform for human resources, information technology and finance that services over 20,000 U.S. companies, per its website. The model’s maker, Z.ai, also known as Zhipu, had already made it on to a U.S. government entity list months …