Fix badges (#827)

Author: simPod

README.md

@@ -1,8 +1,8 @@
 # JSON API Grafana Datasource
 
 [![Build](https://github.com/simPod/GrafanaJsonDatasource/workflows/CI/badge.svg)](https://github.com/simPod/GrafanaJsonDatasource/actions?query=workflow%3A%22CI%22)
-[![Marketplace](https://img.shields.io/badge/dynamic/json?logo=grafana&color=F47A20&label=marketplace&prefix=v&query=%24.items%5B%3F%28%40.slug%20%3D%3D%20%22simpod-json-datasource%22%29%5D.version&url=https%3A%2F%2Fgrafana.com%2Fapi%2Fplugins)](https://grafana.com/grafana/plugins/simpod-json-datasource)
-[![Downloads](https://img.shields.io/badge/dynamic/json?logo=grafana&color=F47A20&label=downloads&query=%24.items%5B%3F%28%40.slug%20%3D%3D%20%22simpod-json-datasource%22%29%5D.downloads&url=https%3A%2F%2Fgrafana.com%2Fapi%2Fplugins)](https://grafana.com/grafana/plugins/simpod-json-datasource)
+[![Marketplace](https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Fgrafana.com%2Fapi%2Fplugins%2Fsimpod-json-datasource%3Fversion%3Dlatest&query=%24.version&logo=grafana&color=F47A20&label=marketplace&prefix=v)](https://grafana.com/grafana/plugins/simpod-json-datasource)
+[![Downloads](https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Fgrafana.com%2Fapi%2Fplugins%2Fsimpod-json-datasource%3Fversion%3Dlatest&query=%24.downloads&logo=grafana&color=F47A20&label=downloads)](https://grafana.com/grafana/plugins/simpod-json-datasource)
 
 The JSON Datasource executes requests against arbitrary backends and parses JSON response into Grafana dataframes.