add get_latest_resource to readme

README.Rmd

@@ -24,6 +24,7 @@ knitr::opts_chunk$set(
 `phsopendata` contains functions to interact with open data from the [Scottish Health and Social Care Open Data platform](https://www.opendata.nhs.scot/) via the CKAN API. 
 
 - `get_resource()` extracts a single resource from an open dataset by resource id
+- `get_latest_resource()` extracts the most recent resource from an open dataset by dataset name
 - `get_dataset()` extracts multiple resources from an open dataset by dataset name
 - `list_datasets()` returns the names of all available datasets 
 - `list_resources()` returns information on all resources within an open dataset by dataset name