chore: coverage badge (#37)

Author: helio-frota

README.md

@@ -1,5 +1,5 @@
 [![ci](https://github.com/trustification/n8n-nodes-dependency-analytics/actions/workflows/ci.yaml/badge.svg)](https://github.com/trustification/n8n-nodes-dependency-analytics/actions/workflows/ci.yaml)
-
+[![codecov](https://codecov.io/gh/trustification/n8n-nodes-dependency-analytics/graph/badge.svg?token=WIH8MUMZ7T)](https://codecov.io/gh/trustification/n8n-nodes-dependency-analytics)
 # n8n-nodes-dependency-analytics
 
 This is an [n8n](https://n8n.io/) community node for [Red Hat Dependency Analytics](https://github.com/trustification).