bug #3549 Fixed createPropertyAccessorBuilder usage (antonbabenko)

This PR was submitted for the 2.4 branch but it was merged into the 2.3 branch instead (closes #3549).

Discussion
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Fixed createPropertyAccessorBuilder usage

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3+

Commits
-------

d36cf2c Fixed createPropertyAccessorBuilder usage

components/property_access/introduction.rst

@@ -350,7 +350,7 @@ configured to enable extra features. To do that you could use the
 :class:`Symfony\\Component\\PropertyAccess\\PropertyAccessorBuilder`::
 
     // ...
-    $accessorBuilder = PropertyAccess::getPropertyAccessorBuilder();
+    $accessorBuilder = PropertyAccess::createPropertyAccessorBuilder();
 
     // Enable magic __call
     $accessorBuilder->enableMagicCall();
@@ -365,7 +365,7 @@ configured to enable extra features. To do that you could use the
     $accessor = $accessorBuilder->getPropertyAccessor();
 
     // Or all in one
-    $accessor = PropertyAccess::getPropertyAccessorBuilder()
+    $accessor = PropertyAccess::createPropertyAccessorBuilder()
         ->enableMagicCall()
         ->getPropertyAccessor();