Merge pull request #2670 from MAGICCC/master

[update.sh] Rename enable_ipv6 option

update.sh

@@ -376,7 +376,7 @@ if grep -q 'SYSCTL_IPV6_DISABLED=1' mailcow.conf; then
   echo
   echo '!! IMPORTANT !!'
   echo
-  echo 'SYSCTL_IPV6_DISABLED was removed due to complications. IPv6 can be disabled by editing "docker-compose.yml" and setting "enabled_ipv6: true" to "enabled_ipv6: false".'
+  echo 'SYSCTL_IPV6_DISABLED was removed due to complications. IPv6 can be disabled by editing "docker-compose.yml" and setting "enable_ipv6: true" to "enable_ipv6: false".'
   echo 'This setting will only be active after a complete shutdown of mailcow by running "docker-compose down" followed by "docker-compose up -d".'
   echo
   echo '!! IMPORTANT !!'