[Messenger] Add AMQP exchange to exchange binding reference

Author: Samik081

messenger.rst

@@ -1363,8 +1363,18 @@ The transport has a number of options:
 ``exchange[flags]``                           Exchange flags                                     ``AMQP_DURABLE``
 ``exchange[name]``                            Name of the exchange
 ``exchange[type]``                            Type of exchange                                   ``fanout``
+``exchange[bindings]``                        The source exchanges to bind this exchange to,
+                                              keyed by the name. Binding direction: source
+                                              exchange -> this exchange
+``exchange[bindings][binding_keys]``          The binding/routing keys (if any) to be used for
+                                              the binding
+``exchange[bindings][binding_arguments]``     Additional binding arguments
 ============================================  =================================================  ===================================
 
+.. versionadded:: 6.3
+
+    The ``exchange[bindings]`` option was introduced in Symfony 6.3.
+
 .. versionadded:: 6.1
 
     The ``connection_name`` option was introduced in Symfony 6.1.