7ba68e0cf1
In 87db61a (trace2: write discard message to sentinel files,
2019-10-04), we added a new "too_many_files" event for when trace2
logging would create too many files in an output directory.
Unfortunately, the api-trace2 doc described a "discard" event instead.
Fix the doc to use the correct event name.
Signed-off-by: Josh Steadmon <steadmon@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>