Update Zend/tests/traits/constant_001.phpt

fix wrong visibilities in the test cases for trait constants

Co-authored-by: Guilliam Xavier <guilliamxavier@users.noreply.github.com>

Author: sj-i

Zend/tests/traits/constant_001.phpt

@@ -5,8 +5,8 @@ Trying to access a constant on Trait via a Class
 
 trait Foo {
     public const PUBLIC = 'public';
-    public const PROTECTED = 'protected';
-    public const PRIVATE = 'private';
+    protected const PROTECTED = 'protected';
+    private const PRIVATE = 'private';
 
     public function f1(): void {
         echo self::PUBLIC, ' via self', PHP_EOL;