Ensure the date column's class is correct to avoid errors with region…

…al epinow

inst/rmarkdown/templates/transmissibility/skeleton/rmdchunks/EpiNow2.Rmd

@@ -95,6 +95,7 @@ res_epinow2_group <- dat_i_day %>%
     date    = date_index,
     region  = .data[[group_var]]
   ) %>%
+  dplyr::mutate(date = as.Date(date)) %>%
   regional_epinow(
     generation_time = generation_time_opts(generation_time),
     stan = stan_opts(samples = 1e3, chains = 2),