test: firmware uploadInProgress: add note about commit
test: firmware uploadInProgress: add note about commit

Add note about missing call, commit().

Signed-off-by: Patrick Venture <36c53fa43f47f3fd67cb2fc38031827244d18a1f@google.com>
Change-Id: Iebdc2a663119539a1fe0b27c821ef1d809d6e9a3

openbmc/phosphor-ipmi-flash