Minor tweaks

Author: javiereguiluz

components/property_info.rst

@@ -412,7 +412,7 @@ library is present::
     $phpDocExtractor->getLongDescription($class, $property);
 
 PhpStanExtractor
-~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~
 
 .. note::
 
@@ -442,6 +442,10 @@ information from annotations of properties and methods, such as ``@var``,
     $phpStanExtractor = new PhpStanExtractor();
     $phpStanExtractor->getTypesFromConstructor(Foo::class, 'bar');
 
+.. versionadded:: 6.1
+
+    The ``PhpStanExtractor`` was introduced in Symfony 6.1.
+
 SerializerExtractor
 ~~~~~~~~~~~~~~~~~~~