ota.bbclass: fix a typo
ota.bbclass: fix a typo

pulsa -> flux.

Signed-off-by: Ming Liu <070ee461bca4578ddd34d91eec07d1f455f3cdee@gmail.com>

fluxos-iot/meta-flux,fluxos-iot/meta-flux,fluxos-iot/meta-flux