minor #20161 [Serializer] Normalizer Callback params confusion: $innerObject should be called $attributeValue and $outerObject should be just $object (thibaut22200)

This PR was submitted for the 7.2 branch but it was merged into the 5.4 branch instead. Discussion ---------- [Serializer] Normalizer Callback params confusion: $innerObject should be called $attributeValue and $outerObject should be just $object Closes #20080 Commits ------- c58aea4 Fix #20080

Author: javiereguiluz

components/serializer.rst

@@ -799,8 +799,8 @@ When serializing, you can set a callback to format a specific object property::
  $encoder = new JsonEncoder();
 
  // all callback parameters are optional (you can omit the ones you don't use)
- $dateCallback = function ($innerObject, $outerObject, string $attributeName, ?string $format = null, array $context = []) {
- return $innerObject instanceof \DateTime ? $innerObject->format(\DateTime::ATOM) : '';
+ $dateCallback = function ($attributeValue, $object, string $attributeName, ?string $format = null, array $context = []) {
+ return $attributeValue instanceof \DateTime ? $attributeValue->format(\DateTime::ATOM) : '';
  };
 
  $defaultContext = [