Array/Object mismatch in generated stories

Fix typo in title.

I suspect this is a core issue, since the JsonSchema/Validator component says:

Validates the given data against the schema and returns an object containing the results Both the php object and the schema are supposed to be a result of a json_decode call. The validation works as defined by the schema proposal in http://json-schema.org.

Here's what is being returned from core:

    // Validator::arrayToObjectRecursive stringifies the props using the JSON
    // encoder. Before that happens, we want to validate classes. Once the
    // classes are validated, we remove them as potential problems for the JSON
    // Schema validation.
    [
      $schema,
      $props_raw,
    ] = $this->validateClassProps($schema, $props_raw, $component_id);
    $schema = Validator::arrayToObjectRecursive($schema);
    $props = Validator::arrayToObjectRecursive($props_raw);

$props_raw:

array(6) {
  ["title"]=>
  string(24) "Item with link and image"
  ["title_suffix"]=>
  string(13) "["foo","bar"]"
  ["image"]=>
  string(163) "{"type":"url","url":"https://designsystem.digital.gov/img/introducing-uswds-2-0/built-to-grow--alt.jpg","alt":"USWDS Card alt text","title":"USWDS Card alt title"}"
  ["url"]=>
  string(11) "my-test-url"
  ["date"]=>
  string(24) "2024-02-04T15:00:00.000Z"
  ["attributes"]=>
  NULL
}

$props:

object(stdClass)#1762 (6) {
  ["title"]=>
  string(24) "Item with link and image"
  ["title_suffix"]=>
  string(13) "["foo","bar"]"
  ["image"]=>
  string(163) "{"type":"url","url":"https://designsystem.digital.gov/img/introducing-uswds-2-0/built-to-grow--alt.jpg","alt":"USWDS Card alt text","title":"USWDS Card alt title"}"
  ["url"]=>
  string(11) "my-test-url"
  ["date"]=>
  string(24) "2024-02-04T15:00:00.000Z"
  ["attributes"]=>
  NULL
}

So it appears that we may need to transform the string to JSON prior to that call.

Just taking notes at this point. This almost works -- the schema now validates, but the $image element no longer renders.

    // Validator::arrayToObjectRecursive stringifies the props using the JSON
    // encoder. Before that happens, we want to validate classes. Once the
    // classes are validated, we remove them as potential problems for the JSON
    // Schema validation.
    [
      $schema,
      $props_raw,
    ] = $this->validateClassProps($schema, $props_raw, $component_id);

    foreach ($props_raw as $id => $prop) {
      if (is_string($prop)) {
        $decoded = json_decode($prop);
        if ($decoded !== NULL && $decoded !== $prop) {
          $props_raw[$id] = $decoded;
        }
      }
    }

    $schema = Validator::arrayToObjectRecursive($schema);
    $props = Validator::arrayToObjectRecursive($props_raw);

This may be a duplicate of 🐛 String value found, but an array or an object is required RTBC but it is very difficult to see where the issue should be fixed.