Documentation: use 'keyid' consistently, not 'key-id'

[git] / Documentation / sequencer.txt

--continue::
        Continue the operation in progress using the information in
        '.git/sequencer'.  Can be used to continue after resolving
        conflicts in a failed cherry-pick or revert.

--quit::
        Forget about the current operation in progress.  Can be used
        to clear the sequencer state after a failed cherry-pick or
        revert.

--abort::
        Cancel the operation and return to the pre-sequence state.