minor #2741 [LiveComponent] Improve misleading smart render algorithm docs (norkunas)

This PR was merged into the 2.x branch.

Discussion
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[LiveComponent] Improve misleading smart render algorithm docs

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Docs?         | definitely
| Issues        | N/A
| License       | MIT

Commits
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76fe1bb7bee [LiveComponent] Improve misleading smart render algorithm docs

Author: Kocal

doc/index.rst

@@ -3503,7 +3503,7 @@ when the component re-renders.
 
 The system doesn't handle every edge case, so here are some things to keep in mind:
 
-* If JavaScript changes an attribute on an element, that change is **preserved**.
+* If JavaScript changes an attribute on a child element, that change is **preserved**.
 * If JavaScript adds a new element, that element is **preserved**.
 * If JavaScript removes an element that was originally rendered by the component,
   that change will be **lost**: the element will be re-added during the next re-render.