improve: clarify definition of "total" in diarization error rate
improve: clarify definition of "total" in diarization error rate

Signed-off-by: nithinraok <422b965f7968b8b6a6401dfdffc0a7ecdac6de66@gmail.com>
Co-authored-by: Hervé BREDIN <c8d67b9325bd7ee39e39c57722a66264fadfbd8b@users.noreply.github.com>
pyannote/pyannote-metrics