Update NEWS with correction

NEWS.md

@@ -6,11 +6,15 @@ This release includes:
 
 1. Functions for the overall severity of an outbreak, the overall severity of an outbreak estimated with an expanding time series of data, and the time-varying severity of an outbreak,
 2. A function to estimate the number of outcomes to be expected from a given number of cases assuming a user-specified distribution of delays between cases and outcomes being known,
-3. A function to estimate the overall (static) or time-varying ascertainment of cases in an outbreak by comparing the relevant severity measures against a user-specified baseline severity,
+3. A function to estimate the overall (static) ascertainment of cases in an outbreak by comparing the relevant severity measures against a user-specified baseline severity,
 4. A data preparation generic with an S3 method for the `<incidence2>` class from the _incidence2_ package,
 5. Example daily case and death data from the 1976 Ebola Virus Disease outbreak as reported in Camacho et al. (2014). <https://doi.org/10.1016/j.epidem.2014.09.003>,
 6. Example daily case and death data from the Covid-19 pandemic over the range 2020-01-01 to 2022-12-31 from the 19 countries with over 100,00 deaths over this period, as taken from the _covidregionaldata_ package which is no longer on CRAN,
 7. Vignettes describing how to get started with severity estimation, and more detailed workflows on different kinds of severity estimation,
 8. A vignette on working with data from the _incidence2_ package, and a vignette on working with delay distributions,
 9. 100% code coverage,
 10. Workflows to render the vignettes and README as a website.
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+## Correction
+
+_cfr_ v0.1.0 only includes functionality for static ascertainment calculations. The functionality for time-varying ascertainment is expected to be included in future versions, and an older implementation was removed just prior to release. The news section for _cfr_ v0.1.0 has been updated to reflect this.