set-verbosity bug

[MetRonnie]

$ cylc set-verbosity DEBUG myworkflow

ERROR - Variable "$level" got invalid value 10.
    Expected type "LogLevels", found 10.
2023-02-27T14:48:05Z ERROR - Traceback (most recent call last):
      File "~/.conda/envs/cylc8.1/lib/python3.10/site-packages/graphql/graphql.py", line 64, in execute_graphql
        return document.execute(
      File "~/github/cylc-flow-8.1/cylc/flow/network/graphql.py", line 260, in execute_and_validate_and_strip
        result = execute_and_validate(schema, document_ast, *args, **kwargs)
      File "~/.conda/envs/cylc8.1/lib/python3.10/site-packages/graphql/backend/core.py", line 32, in execute_and_validate
        return execute(schema, document_ast, *args, **kwargs)
      File "~/.conda/envs/cylc8.1/lib/python3.10/site-packages/graphql/execution/executor.py", line 113, in execute
        exe_context = ExecutionContext(
      File "~/.conda/envs/cylc8.1/lib/python3.10/site-packages/graphql/execution/utils.py", line 113, in __init__
        variable_values = get_variable_values(
      File "~/.conda/envs/cylc8.1/lib/python3.10/site-packages/graphql/execution/values.py", line 74, in get_variable_values
        raise GraphQLError(
    graphql.error.base.GraphQLError: Variable "$level" got invalid value 10.
    Expected type "LogLevels", found 10.