Update README.md

Author: gianlucam76

README.md

@@ -48,7 +48,7 @@ Configuration is asking for:
 ```yaml
 apiVersion: v1
 data:
- config.yaml: '{"resources":[{"group":"","version":"v1","kind":"Secret"},{"group":"apps","version":"v1","kind":"Deployment"}],"logs":[{"namespace":"kube-system","sinceSeconds":600}]}'
+ config.json: '{"resources":[{"group":"","version":"v1","kind":"Secret"},{"group":"apps","version":"v1","kind":"Deployment"}],"logs":[{"namespace":"kube-system","sinceSeconds":600}]}'
 kind: ConfigMap
 metadata:
  name: k8s-collector
@@ -138,4 +138,4 @@ For instance, we asked k8s-collector to collect __Secret__ and __Deployment__ fr
 - Deployment => all collected Deployment instances in the cert-manager namespace will be here
 - Secret => all collected Secret instance in the cert-manager namespace will be here
 
-I developed to be used along with [Sveltos](https://github.com/projectsveltos) but it can be used on its own.
+I developed to be used along with [Sveltos](https://github.com/projectsveltos) but it can be used on its own.