Fix check if installed via apt

Change /usr/share/phpmyadmin/ to /usr/share/roundcube

install/upgrade/manual/migrate_roundcube.sh

@@ -17,7 +17,7 @@ source $HESTIA/conf/hestia.conf
 #                    Verifications                         #
 #----------------------------------------------------------#
 
-if [ ! -d "/usr/share/phpmyadmin/" ]; then
+if [ ! -d "/usr/share/roundcube/" ]; then
     echo "Install Roundcube not done via APT"
     exit 2;
 fi
@@ -46,4 +46,4 @@ then
     # restore backup
     mysql roundcube < ~/roundcube.sql
     /var/lib/roundcube/bin/update.sh --version "$version"
-fi
+fi