fix typo

Author: drizuid

root/app/duck.sh

@@ -48,7 +48,7 @@ fi
         elif [[ "${IPV4}" == "" ]] && [[ "${IPV6}" != "" ]]; then
             echo "Your IP was updated at $(date) to IPv6: ${IPV6}"
         else
-            echo "Your IP was updated at $(date) to IPv4: ${IPV4} & IPv6 to: {$IPV6}"
+            echo "Your IP was updated at $(date) to IPv4: ${IPV4} & IPv6 to: ${IPV6}"
         fi
     elif [[ "${RESPONSE}" = "OK" ]] && [[ "${IPCHANGE}" = "NOCHANGE" ]]; then
         echo "DuckDNS request at $(date) successful. IP(s) unchanged."