chore(deps): bump next from 14.2.10 to 14.2.15 in /signalR-nextjs-chat/chat-frontend in the npm_and_yarn group across 1 directory

chore(deps): bump next from 14.2.10 to 14.2.15 in /signalR-nextjs-chat/chat-frontend in the npm_and_yarn group across 1 directory #347