Update sql-ast-narrowing.php

Author: staabm

tests/sqlAst/data/sql-ast-narrowing.php

@@ -140,7 +140,7 @@ public function ifnull(PDO $pdo): void
         assertType('PDOStatement<array{col: float, 0: float}>', $stmt);
 
         $stmt = $pdo->query('SELECT ifnull(c_int, 123.23) as col from typemix');
-        assertType('PDOStatement<array{col: numeric-string, 0: numeric-string}>', $stmt);
+        assertType('PDOStatement<array{col: lowercase-string&numeric-string, 0: lowercase-string&numeric-string}>', $stmt);
 
         $stmt = $pdo->query('SELECT ifnull(123.23, c_int) as col from typemix');
         assertType("PDOStatement<array{col: '123.23', 0: '123.23'}>", $stmt);