fix: correct environment variable name in supabase-middleware-client#24

studiovoyager wants to merge 1 commit intoKolbySisk:mainKolbySisk/next-supabase-stripe-starter:mainfrom

studiovoyager:fix/supabase-middleware-client-typostudiovoyager/next-supabase-stripe-starter:fix/supabase-middleware-client-typoCopy head branch name to clipboard