fix: correctly handle `novalidate` attribute casing (#15083)

This PR fixes #15082 by correctly handling the HTML element novalidate attribute casing through noValidate DOM property mapping.

.changeset/pink-wolves-search.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: correctly handle `novalidate` attribute casing

packages/svelte/src/utils.js

@@ -196,7 +196,8 @@ const ATTRIBUTE_ALIASES = {
 	readonly: 'readOnly',
 	defaultvalue: 'defaultValue',
 	defaultchecked: 'defaultChecked',
-	srcobject: 'srcObject'
+	srcobject: 'srcObject',
+	novalidate: 'noValidate'
 };
 
 /**

packages/svelte/tests/runtime-runes/samples/form-novalidate-casing/_config.js

@@ -0,0 +1,8 @@
+import { test } from '../../test';
+
+export default test({
+	html: `
+		<form novalidate></form>
+		<form novalidate></form>
+`
+});

packages/svelte/tests/runtime-runes/samples/form-novalidate-casing/main.svelte

@@ -0,0 +1,6 @@
+<script>
+	let noValidate = $state(true);
+</script>
+
+<form novalidate={true}></form>
+<form {noValidate}></form>