Bug 1917208 - Fix metadata for js wasm test

Differential Revision: https://phabricator.services.mozilla.com/D221643

Author: jgraham

testing/web-platform/meta/wasm/jsapi/js-string/basic.tentative.any.js.ini

@@ -10,3 +10,7 @@ prefs: [javascript.options.wasm_js_string_builtins:true]
 [basic.tentative.any.worker.html]
   [basic]
     expected: FAIL
+
+[basic.tentative.any.js]
+  [Untitled]
+    expected: FAIL