perf kwork: Fix spelling mistake "COMMMAND" -> "COMMAND"

There is a spelling mistake in a literal string. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: kernel-janitors@vger.kernel.org
Link: https://lore.kernel.org/r/20230915090910.30182-1-colin.i.king@gmail.com


Signed-off-by: Namhyung Kim <namhyung@kernel.org>