Hey nostr:nprofile1qqsdv8emcke7k3qqaldwv956tstu40ejg663gdsaayuuujs6pknw7jspzfmhxue69uhhqatjwpkx2urpvuhx2ucpzemhxue69uhhyetvv9ujuurjd9kkzmpwdejhggpzdxe how do I change my vanity URL to primal.net/BitcoinArtMag ?