minor #14941 [CS] Add comma after last array item in multi-line array (sebpacz)

This PR was merged into the 4.4 branch.

Discussion
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[CS] Add comma after last array item in multi-line array

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3b1c006 [CS] Add comma after last array item in multi-line array

Author: OskarStark

messenger.rst

@@ -188,7 +188,7 @@ that uses this configuration:
                     // or expanded to configure more options
                     'async' => [
                        'dsn' => '%env(MESSENGER_TRANSPORT_DSN)%',
-                       'options' => []
+                       'options' => [],
                     ],
                 ],
             ],