move aside to correct location

Author: e111077

packages/lit-dev-content/site/docs/v3/components/shadow-dom.md

@@ -176,12 +176,8 @@ You can specify fallback content for a slot. The fallback content is shown when
 
 ## Accessing slotted children { #accessing-slotted-children }
 
-{% aside "info" %}
-
 To access children assigned to slots in your shadow root, you can use the standard `slot.assignedNodes` or `slot.assignedElements` methods with the `slotchange` event.
 
-{% endaside %}
-
 For example, you can create a getter to access assigned elements for a particular slot:
 
 ```js
@@ -191,8 +187,12 @@ get _slottedChildren() {
 }
 ```
 
+{% aside "info" "no-header" %}
+
 The elements are assigned only after the slot is rendered, so if you need to access assigned elements at startup, you need to wait for `firstUpdated` or `updated`. If you want to access assigned elements when your render changes, you can use `slotchange`.
 
+{% endaside %}
+
 You can use the `slotchange` event to take action when nodes are first assigned or change.
 The following example extracts the text content of all of the slotted children.