Fix 2.7.6 to 2.8.0 SQL update script.

www/install/sql/centreon/Update-DB-2.7.6_to_2.8.0.sql

 -- Change version of Centreon
-UPDATE `informations` SET `value` = '2.8.0' WHERE CONVERT( `informations`.`key` USING utf8 )  = 'version' AND CONVERT ( `informations`.`value` USING utf8 ) = '2.7.5' LIMIT 1;
+UPDATE `informations` SET `value` = '2.8.0' WHERE CONVERT( `informations`.`key` USING utf8 )  = 'version' AND CONVERT ( `informations`.`value` USING utf8 ) = '2.7.6' LIMIT 1;
 
 -- Add graphite output for centreon-broker
 INSERT IGNORE INTO cb_module (name, libname, loading_pos, is_activated)