Change info flag to verbose

Fixes incorrect flag for displaying version info

Fixes #6554

docs/static/plugin-manager.asciidoc

@@ -16,7 +16,7 @@ available in your deployment:
 [source,shell]
 ----------------------------------
 bin/logstash-plugin list <1>
-bin/logstash-plugin list --info <2>
+bin/logstash-plugin list --verbose <2>
 bin/logstash-plugin list '*namefragment*' <3>
 bin/logstash-plugin list --group output <4>
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