### Bug Description Snapcraft displays incorrect help text with `snapcraft close --help`, indicating a flag should be used which doesn't exist. Specifically, a `--channel` option. This option doesn't exist, instead the channel is a positional argument of the subcommand. ### To Reproduce `snapcraft close --help`, compare example's flag to list of flags in the options section. ### Environment 8.11.1 ### snapcraft.yaml ```yaml N/A ``` ### Relevant log output ```shell  snapcraft close -h Starting snapcraft, version 8.11.1.post53 Logging execution to '/home/dilyn/.local/state/snapcraft/log/snapcraft-20250829-203814.334524.log' Usage: snapcraft close [options] <name> <channel> Summary: Closing a channel allows the channel that is closed to track the channel that follows it in the channel release chain. As such, closing the 'candidate' channel for a snap would make that snap begin to track the 'stable' channel. Examples:: snapcraft close my-snap --channel beta Positional arguments: name: The snap name to release channel: The channel to close Options: -h, --help: Show this help message and exit -v, --verbose: Show debug information and be more verbose -q, --quiet: Only show warnings and errors, not progress --verbosity: Set the verbosity level to 'quiet', 'brief', 'verbose', 'debug' or 'trace' -V, --version: Show the application version and exit See also: list-revisions promote push release revisions status upload For a summary of all commands, run 'snapcraft help --all'. ``` ### Additional context _No response_