update.sh: changed SKIP_FTS default to y instead n for updates

update.sh

@@ -473,7 +473,7 @@ adapt_new_options() {
         echo "Adding new option \"${option}\" to mailcow.conf"
         echo '# Skip FTS (Fulltext Search) for Dovecot on low-memory systems or if you simply want to disable it.' >> mailcow.conf
         echo "# Dovecot inside mailcow use Flatcurve as FTS Backend." >> mailcow.conf
-        echo "SKIP_FTS=n" >> mailcow.conf
+        echo "SKIP_FTS=y" >> mailcow.conf
       fi
     elif [[ ${option} == "FTS_PROCS" ]]; then
       if ! grep -q ${option} mailcow.conf; then