re-add accidentally removed changelog examples

Author: xabbuh

CHANGELOG.md

@@ -6,7 +6,55 @@ CHANGELOG
 
  * Add the `filenameCharset` and `filenameCountUnit` options to the `File` constraint
  * Deprecate defining custom constraints not supporting named arguments
+
+   Before:
+
+   ```php
+   use Symfony\Component\Validator\Constraint;
+
+   class CustomConstraint extends Constraint
+   {
+       public function __construct(array $options)
+       {
+           // ...
+       }
+   }
+   ```
+
+   After:
+
+   ```php
+   use Symfony\Component\Validator\Attribute\HasNamedArguments;
+   use Symfony\Component\Validator\Constraint;
+
+   class CustomConstraint extends Constraint
+   {
+       #[HasNamedArguments]
+       public function __construct($option1, $option2, $groups, $payload)
+       {
+           // ...
+       }
+   }
+   ```
  * Deprecate passing an array of options to the constructors of the constraint classes, pass each option as a dedicated argument instead
+
+   Before:
+
+   ```php
+   new NotNull([
+       'groups' => ['foo', 'bar'],
+       'message' => 'a custom constraint violation message',
+   ])
+   ```
+
+   After:
+
+   ```php
+   new NotNull(
+       groups: ['foo', 'bar'],
+       message: 'a custom constraint violation message',
+   )
+   ```
  * Add support for ratio checks for SVG files to the `Image` constraint
  * Add support for the `otherwise` option in the `When` constraint
  * Add support for multiple fields containing nested constraints in `Composite` constraints