Fix typo.
Fix typo.

	* doc/en/examples/greet.cs: Fix typo.

MikeJansen/NDesk.Options.StrongNamed,chakrit/ndesk-options-mirror,chakrit/ndesk-options-mirror,MikeJansen/NDesk.Options.StrongNamed,MikeJansen/NDesk.Options.StrongNamed