modules: fix examples to use FQCN (#644)

* modules: fix examples to use FQCN

* fix

* fix

* fix

plugins/modules/clustering/etcd3.py

@@ -67,7 +67,7 @@ author:
 
 EXAMPLES = """
 - name: Store a value "bar" under the key "foo" for a cluster located "http://localhost:2379"
-  etcd3:
+  community.general.etcd3:
     key: "foo"
     value: "baz3"
     host: "localhost"
@@ -75,7 +75,7 @@ EXAMPLES = """
     state: "present"
 
 - name: Authenticate using user/password combination with a timeout of 10 seconds
-  etcd3:
+  community.general.etcd3:
     key: "foo"
     value: "baz3"
     state: "present"
@@ -84,7 +84,7 @@ EXAMPLES = """
     timeout: 10
 
 - name: Authenticate using TLS certificates
-  etcd3:
+  community.general.etcd3:
     key: "foo"
     value: "baz3"
     state: "present"