`check_api` Checks Same Week/Date Range Twice

[ThorntonMatthewD]

slack-events-bot/src/bot.py

Lines 131 to 136 in f8b800e

	# keep current week's post up to date
	await parse_events_for_week(today, resp)
	# potentially post next week 5 days early
	probe_date = today + datetime.timedelta(days=5)
	await parse_events_for_week(probe_date, resp)

At certain points during the week the above code will cause parse_events_for_week to be called with probe_date values that end up causing the same week to have messages posted/updated for it twice.

I think it would be good to check for the overlap or some other condition before firing off the second, lookahead function execution on L136.