use correct attribute checked

.changeset/brown-rocks-ring.md

@@ -1,15 +1,5 @@
 ---
-'astro': major
+'astro': patch
 ---
 
-add `checked` to htmlBooleanAttributes.
-
-Previously, `checked={true}` returned `checked="true"`, which is considered [invalid](https://html.spec.whatwg.org/#boolean-attributes).
-Now, this should return `checked` only. 
-Note: Falsy values would omit the attribute, which is correct behavior.
-
-You'll only need to edit your existing code if you are checking the `checked` attribute's value to be the string `'true'` like so:
-```js
-- el.getAttribute('checked') === 'true'
-+ el.hasAttribute('checked')
-```
+add `checked` to htmlBooleanAttributes.

packages/astro/src/runtime/server/render/util.ts

@@ -7,7 +7,7 @@ import { HTMLString, markHTMLString } from '../escape.js';
 export const voidElementNames =
 	/^(area|base|br|col|command|embed|hr|img|input|keygen|link|meta|param|source|track|wbr)$/i;
 const htmlBooleanAttributes =
-	/^(?:allowfullscreen|async|autofocus|autoplay|checkbox|controls|default|defer|disabled|disablepictureinpicture|disableremoteplayback|formnovalidate|hidden|loop|nomodule|novalidate|open|playsinline|readonly|required|reversed|scoped|seamless|selected|itemscope)$/i;
+	/^(?:allowfullscreen|async|autofocus|autoplay|checked|controls|default|defer|disabled|disablepictureinpicture|disableremoteplayback|formnovalidate|hidden|loop|nomodule|novalidate|open|playsinline|readonly|required|reversed|scoped|seamless|selected|itemscope)$/i;
 const htmlEnumAttributes = /^(?:contenteditable|draggable|spellcheck|value)$/i;
 // Note: SVG is case-sensitive!
 const svgEnumAttributes = /^(?:autoReverse|externalResourcesRequired|focusable|preserveAlpha)$/i;