docs: `value` cannot be set via spread for indirectly bound values (#4832)

site/content/docs/02-template-syntax.md

@@ -121,6 +121,9 @@ An element or component can have multiple spread attributes, interspersed with r
 <input {...$$restProps}>
 ```
 
+
+> The `value` attribute of an `input` element or its children `option` elements must not be set with spread attributes when using `bind:group` or `bind:checked`. Svelte needs to be able to see the element's `value` directly in the markup in these cases so that it can link it to the bound variable.
+
 ---
 
 ### Text expressions