Update argument_value_resolver.rst

Fix documentation for Built-In Value Resolvers

The code in the current documentation produces an error when implemented like described. The fix is to not include the FQN of the Enum class, because an instance of BackedEnum is expected.

Author: Jay-Way

controller/argument_value_resolver.rst

@@ -65,7 +65,7 @@ Symfony ships with the following value resolvers in the
                 // this allows all values defined in the Enum
                 'suit' => new EnumRequirement(Suit::class),
                 // this restricts the possible values to the Enum values listed here
-                'suit' => new EnumRequirement([Suit::class, Suit::Diamonds, Suit::Spades]),
+                'suit' => new EnumRequirement([Suit::Diamonds, Suit::Spades]),
             ])]
             public function list(Suit $suit): Response
             {