Fix wrong static object call

Originally I added this function to CommonObject, but it looked to me that using DoliDB as recipient is more logical.
However, I forgot to adapt this change during the copy/paste. Sorry.

htdocs/core/db/DoliDB.class.php

@@ -456,6 +456,6 @@ public function getRows($sql)
 	 */
 	static public function checkTableName($table_name)
 	{
-		return CommonObject::$_deprecated_table_names[$table_name]  ?? $table_name;
+		return DoliDB::$_deprecated_table_names[$table_name]  ?? $table_name;
 	}
 }