Tests: worker_shutdown_timeout_h2.t TODO adjusted.

worker_shutdown_timeout_h2.t

diff --git a/worker_shutdown_timeout_h2.t b/worker_shutdown_timeout_h2.t
index 9d099e6..fcde6ce 100644
--- a/worker_shutdown_timeout_h2.t
+++ b/worker_shutdown_timeout_h2.t
@@ -59,7 +59,9 @@
 ok($s->new_stream(), 'new stream');
 
 select undef, undef, undef, 0.1;
-$t->stop()->todo_alerts();
+$t->stop();
+
+$t->todo_alerts() unless $t->has_version('1.17.4');
 
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