minor #17341 [Console] docs(test): add array example for options with CommandTester (kpn13)

This PR was submitted for the 6.2 branch but it was merged into the 4.4 branch instead.

Discussion
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[Console] docs(test): add array example for options with CommandTester

This PR adds an example of how we can set an array input as option using the CommandTester.

It's not so difficult to find the way by ourselves but it doesn't seem to be explicit somewhere.

Commits
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e24a36d docs(test): add array example for options

Author: javiereguiluz

console.rst

@@ -372,6 +372,8 @@ console::
 
                 // prefix the key with two dashes when passing options,
                 // e.g: '--some-option' => 'option_value',
+                // use brackets for testing array value,
+                // e.g: '--some-option' => ['option_value'],
             ]);
 
             // the output of the command in the console