Use Ruby YAML library to serialize Ansible examples (#196)

<!-- This change is generated by MagicModules. -->
/cc @rambleraptor

plugins/modules/gcp_container_cluster.py

@@ -265,19 +265,19 @@ extends_documentation_fragment: gcp
 EXAMPLES = '''
 - name: create a cluster
   gcp_container_cluster:
-      name: my-cluster
-      initial_node_count: 2
-      master_auth:
-        username: cluster_admin
-        password: my-secret-password
-      node_config:
-        machine_type: n1-standard-4
-        disk_size_gb: 500
-      location: us-central1-a
-      project: "test_project"
-      auth_kind: "serviceaccount"
-      service_account_file: "/tmp/auth.pem"
-      state: present
+    name: my-cluster
+    initial_node_count: 2
+    master_auth:
+      username: cluster_admin
+      password: my-secret-password
+    node_config:
+      machine_type: n1-standard-4
+      disk_size_gb: 500
+    location: us-central1-a
+    project: test_project
+    auth_kind: serviceaccount
+    service_account_file: "/tmp/auth.pem"
+    state: present
 '''
 
 RETURN = '''