feat(examples): add hello-service example (#6)

Author: JacopoDaeli

simple-service-external-secret.yml examples/hello-service-external-secret.yml

@@ -1,9 +1,9 @@
 apiVersion: 'kubernetes-client.io/v1'
 kind: ExtrenalSecret
 metadata:
-  name: simple-service
+  name: hello-service
 secretDescriptor:
   backendType: secretManager
   properties:
-    - key: simple-service/simple-service/hello
-      name: hello
+    - key: hello-service/password
+      name: password