Add note in code about company-specific timing

[sarabodach]

sdtmchecks/R/check_ts_cmdict.R

Lines 89 to 95 in 5ecdd90

	# if today is before the first Monday of May, WHODrug version is the previous version, ie SEPTEMBER 1, 2020
	# if today is after the first Monday of November, WHODrug version is the next version, ie SEPTEMBER 1, 2021
	whodrug_ver <- case_when(t < date1 ~ paste0("SEPTEMBER 1, ", as.numeric(y)-1),
	t >= date1 & t< date2 ~ paste0("MARCH 1, ", as.numeric(y)),
	t>= date2 ~ paste0("SEPTEMBER 1, ", as.numeric(y))
	)