Inconsistency between the code and the API doc of DSChiefApprovals.lock and DSChiefApprovals.free

[DocCon-team]

Hi,

In the APIs doc in README.md, it is stated that the functions DSChiefApprovals.lock and DSChiefApprovals.free fire a LogLockFree event. However, their corresponding code does not emit such an event actually.

ds-chief/README.md

Line 105 in 4a833cd

Fires a `LogLockFree` event.

ds-chief/README.md

Line 112 in 4a833cd

slate. Fires a `LogLockFree` event.

A potential fix could be removing the "Fires a LogLockFree event" sentence from README.md.

Could you please check it?

Thanks.