highlight update as major change

NEWS.md

@@ -1,6 +1,10 @@
 # EpiNow2 1.4.9000
 
-## Breaking changes
+## Major changes
+
+* Delay discretisation is now based on a two-day censoring window (with uniform probability in between), based on recommendations in [Park et al, medRxiv, 2024](https://doi.org/10.1101/2024.01.12.24301247). By @sbfnk in #518 and reviewed by @jamesmbaazam.
+
+## OTher breaking changes
 
 * The functions `get_dist`, `get_generation_time`, `get_incubation_period` have been deprecated and replaced with examples. By @sbfnk in #481 and reviewed by @seabbs.
 * The utility function `update_list()` has been deprecated in favour of `utils::modifyList()` because it comes with an installation of R. By @jamesmbaazam in #491 and reviewed by @seabbs.
@@ -41,7 +45,6 @@
 * Updated the parameterisation of the dispersion term `phi` to be `phi = 1 / sqrt_phi ^ 2` rather than the previous parameterisation `phi = 1 / sqrt(sqrt_phi)` based on the suggested prior [here](https://github.com/stan-dev/stan/wiki/Prior-Choice-Recommendations#story-when-the-generic-prior-fails-the-case-of-the-negative-binomial) and the performance benefits seen in the `epinowcast` package (see [here](https://github.com/epinowcast/epinowcast/blob/8eff560d1fd8305f5fb26c21324b2bfca1f002b4/inst/stan/epinowcast.stan#L314)). By @seabbs in #487 and reviewed by @sbfnk.
 * Added an `na` argument to `obs_opts()` that allows the user to specify whether NA values in the data should be interpreted as missing or accumulated in the next non-NA data point. By @sbfnk in #534 and reviewed by @seabbs.
 * Growth rates are now calculated directly from the infection trajectory as `log I(t) - log I(t - 1)`. Originally by @seabbs in #213, finished by @sbfnk in #610 and reviewed by @seabbs.
-* Updated delay discretisation to be based on a two-day censoring window (with uniform probability in between), based on recommendations in [Park et al, medRxiv, 2024](https://doi.org/10.1101/2024.01.12.24301247). By @sbfnk in #518 and reviewed by @jamesmbaazam.
 
 # EpiNow2 1.4.0