[badge][xs]: gh actions status badge.

README.md

@@ -1,3 +1,5 @@
+![.github/workflows/actions.yml](https://github.com/datasets/covid-19/workflows/.github/workflows/actions.yml/badge.svg?branch=master)
+
 Coronavirus disease 2019 (COVID-19) time series listing confirmed cases, reported deaths and reported recoveries. Data is disaggregated by by country (and sometimes subregion). Coronavirus disease (COVID-19) is caused by the [Severe acute respiratory syndrome Coronavirus 2 (SARS-CoV-2)][sars2] and has had a worldwide effect. On March 11 2020, the World Health Organization (WHO) declared it a pandemic, pointing to the over 118,000 cases of the coronavirus illness in over 110 countries and territories around the world at the time.
 
 [covid]: https://en.wikipedia.org/wiki/Coronavirus_disease_2019