minor #19133 [Messenger] Fix table indentation (alexandre-daubois)

This PR was merged into the 6.3 branch.

Discussion
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[Messenger] Fix table indentation

And fix the CI at the same time 😄

Commits
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536ea8b [Messenger] Fix table indentation

Author: OskarStark

messenger.rst

@@ -2016,16 +2016,16 @@ You can configure your handler by passing options to the attribute::
 
 Possible options to configure with the attribute are:
 
-============================  ====================================================================================================
-Option                        Description
-============================  ====================================================================================================
-``bus``                       Name of the bus from which the handler can receive messages, by default all buses.
-``fromTransport``             Name of the transport from which the handler can receive messages, by default all transports.
-``handles``                   Type of messages (FQCN) that can be processed by the handler, only needed if can't be guessed by
-                              type-hint.
-``method``                    Name of the method that will process the message, only if the target is a class.
-``priority``                  Priority of the handler when multiple handlers can process the same message.
-============================  ====================================================================================================
+==============================  ====================================================================================================
+Option                          Description
+==============================  ====================================================================================================
+``bus``                         Name of the bus from which the handler can receive messages, by default all buses.
+``fromTransport``               Name of the transport from which the handler can receive messages, by default all transports.
+``handles``                     Type of messages (FQCN) that can be processed by the handler, only needed if can't be guessed by
+                                type-hint.
+``method``                      Name of the method that will process the message, only if the target is a class.
+``priority``                    Priority of the handler when multiple handlers can process the same message.
+==============================  ====================================================================================================
 
 .. _messenger-handler-config: