Typo in config.performance.php

See https://code.vtiger.com/vtiger/vtigercrm/-/blob/master/config.performance.php?ref_type=heads#L13

Note the last "l" in "LOGLEVEl"... That rather upsets my OCD :-)

FWIW, modules/vtiger/helpers/Logger.php will need changing too. But those are the only two occurrences according to grep.