tools: ynl: remove trailing semicolon

Commit e8a6c515

 ("tools: ynl: allow user to pass enum string
instead of scalar value") added a semicolon at the end of a line.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20240308192555.2550253-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>