Bug 1561163 [wpt PR 17452] - Improve failing condition of a test., a=testonly

Automatic update from web-platform-tests
Improve failing condition of a test (#17452)

So it doesn't time out.
--

wpt-commits: 1f512077ca0998e0af60ff727eea8c8ba5d78491
wpt-pr: 17452

testing/web-platform/tests/svg/scripted/script-runs-in-shadow-tree.html

@@ -7,6 +7,9 @@
 <div id="host"></div>
 <script>
   let svgScript = document.createElementNS("http://www.w3.org/2000/svg", "script");
-  svgScript.innerHTML = `test(function() {}, "svg:script runs correctly in a shadow tree");`;
+  svgScript.innerHTML = "window.scriptRan = true";
   document.getElementById("host").attachShadow({ mode: "open" }).appendChild(svgScript);
+  test(function() {
+    assert_true(window.scriptRan);
+  }, "svg:script runs correctly in a shadow tree");
 </script>