feat(sql) update script of 2.8.19 to 2.8.20 (#6139)

* feat(sql) update script of 2.8.19 to 2.8.20

www/install/insertBaseConf.sql

@@ -2,7 +2,7 @@
 -- Insert version
 --
 
-INSERT INTO `informations` (`key` ,`value`) VALUES ('version', '2.8.19');
+INSERT INTO `informations` (`key` ,`value`) VALUES ('version', '2.8.20');
 
 --
 -- Contenu de la table `contact`

www/install/sql/centreon/Update-DB-2.8.19_to_2.8.20.sql

+-- Change version of Centreon
+UPDATE `informations` SET `value` = '2.8.20' WHERE CONVERT( `informations`.`key` USING utf8 ) = 'version' AND CONVERT ( `informations`.`value` USING utf8 ) = '2.8.19' LIMIT 1;