Update documentation

plugins/modules/cloudformation_stack_set.py

@@ -182,9 +182,11 @@
     description: Test stack in two accounts
     state: present
     template_url: https://s3.amazonaws.com/my-bucket/cloudformation.template
-    accounts: [1234567890, 2345678901]
+    accounts:
+      - 123456789012
+      - 234567890123
     regions:
-    - us-east-1
+      - us-east-1
 
 - name: on subsequent calls, templates are optional but parameters and tags can be altered
   community.aws.cloudformation_stack_set:
@@ -195,9 +197,11 @@
     tags:
       foo: bar
       test: stack
-    accounts: [1234567890, 2345678901]
+    accounts:
+      - 123456789012
+      - 234567890123
     regions:
-    - us-east-1
+     - us-east-1
 
 - name: The same type of update, but wait for the update to complete in all stacks
   community.aws.cloudformation_stack_set:
@@ -209,7 +213,26 @@
     tags:
       foo: bar
       test: stack
-    accounts: [1234567890, 2345678901]
+    accounts:
+      - 123456789012
+      - 234567890123
+    regions:
+    - us-east-1
+
+- name: Register new accounts (create new stack instances) with an existing stack set.
+  community.aws.cloudformation_stack_set:
+    name: my-stack
+    state: present
+    wait: true
+    parameters:
+      InstanceName: my_restacked_instance
+    tags:
+      foo: bar
+      test: stack
+    accounts:
+      - 123456789012
+      - 234567890123
+      - 345678901234
     regions:
     - us-east-1
 """