Fix indentation of example (#63789)

Remove no_log since module_defaults aren't displayed like set_fact was

docs/docsite/rst/dev_guide/platforms/aws_guidelines.rst

@@ -644,14 +644,15 @@ for every call, it's preferable to use :ref:`module_defaults <module_defaults>`.
 
 .. code-block:: yaml
 
-   - name: set connection information for all tasks
+   - name: set connection information for aws modules and run tasks
      module_defaults:
        group/aws:
          aws_access_key: "{{ aws_access_key }}"
          aws_secret_key: "{{ aws_secret_key }}"
          security_token: "{{ security_token }}"
          region: "{{ aws_region }}"
-     no_log: yes
+
+     block:
 
      - name: Do Something
        ec2_instance: