test: mark test-http2-settings-flood as flaky on Windows

Refs: #25043
PR-URL: #25048
Reviewed-By: Myles Borins <myles.borins@gmail.com>

Author: Trott

test/sequential/sequential.status

@@ -13,6 +13,8 @@ test-inspector-bindings               : PASS, FLAKY
 test-inspector-debug-end              : PASS, FLAKY
 test-inspector-async-hook-setup-at-signal:  PASS, FLAKY
 test-inspector-stop-profile-after-done: PASS, FLAKY
+# https://github.com/nodejs/node/issues/25043
+test-http2-settings-flood: PASS,FLAKY
 
 [$system==linux]