Missing one language string in language file for update process

Author: xillibit

src/admin/language/en-GB/en-GB.com_kunena.install.ini

@@ -153,6 +153,7 @@ COM_KUNENA_INSTALL_520_RANKS_TITLE_VALUE_IN_TABLES = "Update ranks title value t
 ; JROOT/administrator/components/com_kunena/install/updates/php/5.2.15-2021-07-24_configuration.php
 
 COM_KUNENA_INSTALL_5215_UPDATE_CONFIGURATION = "Update Kunena configuration to reflect the changes on variables names"
+COM_KUNENA_INSTALL_624_CHANGE_COLLATION_ON_COLUMNS_TO_UTF8MB4 = "Change the collation on columns of Kunena tables to Utf8_mb4"
 
 ; JROOT/administrator/components/com_kunena/install/version.php