Fix APISource definition

Author: lbroudoux

gitops-demo/overlays/minikube.local/microcks-apisource.yaml

@@ -13,5 +13,4 @@ spec:
     #- url: https://raw.githubusercontent.com/microcks/microcks/master/samples/HelloService.metadata.yml
     #  mainArtifact: false
     #- url: https://raw.githubusercontent.com/microcks/microcks/master/samples/HelloService.postman.json
-    #  mainArtifact: false
-EOF
+    #  mainArtifact: false