update README for release

README.md

@@ -7,7 +7,7 @@
 [![DOI](https://zenodo.org/badge/128420765.svg)](https://zenodo.org/badge/latestdoi/128420765)
 
 ### Overview
-This repository contains data releases from the [*Streets Not Thru* Project](https://chris-prener.github.io/barriers). It currently contains point locations for all known current and historic street closures in `.csv`, `.shp`, and `.geoJSON` formats. You can preview these data both [here](https://github.com/chris-prener/barriers-data/blob/master/location-data/geoJSON/STL_BARRIERS_All.geojson) and on [our website](https://chris-prener.github.io/barriers/barriers/).
+This repository contains data releases from the [*Streets Not Thru* Project](https://chris-prener.github.io/barriers). It currently contains point locations for all known current and historic street closures in `.csv`, `.shp`, `.gpkg`, and `.geoJSON` formats. You can preview these data both [here](https://github.com/chris-prener/barriers-data/blob/master/location-data/geoJSON/STL_BARRIERS_All.geojson) and on [our website](https://chris-prener.github.io/barriers/barriers/).
 
 ### Support and Feedback
 If you have found a typo, omission, or have a suggestion, please check the [contribution guidelines](.github/CONTRIBUTING.md) guidelines before opening an issue. Please note that contributions to this project are governed by a [Contributor Code of Conduct](.github/CODE_OF_CONDUCT.md) and, for Saint Louis University community members, our various University policies.