test: update encoding web-platform tests

PR-URL: https://github.com/nodejs/node/pull/53477
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

test/fixtures/wpt/encoding/sharedarraybuffer.https.html

@@ -6,9 +6,7 @@
 test(() => {
   const decoder = new TextDecoder('utf-8');
   const buffer = new SharedArrayBuffer(4);
-  assert_throws_js(TypeError, () => {
-    decoder.decode(new Uint8Array(buffer));
-  }, 'constructing TextDecoder with SharedArrayBuffer view should throw');
+  assert_equals(decoder.decode(new Uint8Array(buffer)), "\u0000\u0000\u0000\u0000");
 }, 'decoding SharedArrayBuffer');
 
 </script>