tests: sync expected error message for click 8.4.0

`click` `8.4.0` changed the error hint message and prefers
long option name over the short one.

https://github.com/pallets/click/releases/tag/8.4.0
> The error hint now uses Command.get_help_option_names to pick
  non-shadowed help option names, so Try '... -h' no longer points to a
  subcommand option that shadows -h. All surviving names are shown
  (-h/--help). #2790 #3208

Fixes: #132
Signed-off-by: Stanislav Levin <slev@altlinux.org>

Author: stanislavlevin

tests/test_commands_/test_suggestion_group_failure.md

@@ -1,4 +1,4 @@
 Usage: demo [OPTIONS] COMMAND [ARGS]...
-Try 'demo -h' for help.
+Try 'demo --help' for help.
 
 Error: No such command 'list'.

tests/test_commands_/test_suggestion_group_success.md

@@ -1,5 +1,5 @@
 Usage: demo [OPTIONS] COMMAND [ARGS]...
-Try 'demo -h' for help.
+Try 'demo --help' for help.
 
 Error: No such command 'searh'.
 The most similar command is 'search'.