minor #35376 [FrameworkBundle] Add --show-arguments example to debug:container command help text (jschaedl)

This PR was merged into the 4.4 branch.

Discussion
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[FrameworkBundle] Add --show-arguments example to debug:container command help text

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | - <!-- prefix each issue number with "Fix #", if any -->
| License       | MIT
| Doc PR        | - <!-- required for new features -->

I like this option a lot and I think it deserves to be mentioned in the command help text :-)

Commits
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f703a58215 [FrameworkBundle] Add --show-arguments example to debug:container command help text

Author: nicolas-grekas

Command/ContainerDebugCommand.php

@@ -74,6 +74,10 @@ protected function configure()
 
   <info>php %command.full_name% validator</info>
 
+To get specific information about a service including all its arguments, use the <info>--show-arguments</info> flag:
+
+  <info>php %command.full_name% validator --show-arguments</info>
+
 To see available types that can be used for autowiring, use the <info>--types</info> flag:
 
   <info>php %command.full_name% --types</info>