Update root command description

Author: dchenz

src/main/java/org/cryptomator/cli/CryptomatorCli.java

@@ -11,7 +11,7 @@
 @Command(name = "cryptomator-cli",
         mixinStandardHelpOptions = true,
         version = "${org.cryptomator.cli.version}",
-        description = "Unlocks a cryptomator vault and mounts it into the system.",
+        description = "Manage Cryptomator vaults from the command line.",
         subcommands = {Create.class, Unlock.class, ListMounters.class, CommandLine.HelpCommand.class})
 public class CryptomatorCli {