[utest][threads] Cleanup: Fix test suite naming to be consistent

Fix one case where "Thread" was used instead of "Threads".

Bug: 51652
Change-Id: I97a50e0be4a5de202e6dba72eb2d56c578574eca
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/405389
Commit-Queue: Mark Seaborn <mseaborn@google.com>
Reviewed-by: Scott Graham <scottmg@google.com>
Testability-Review: Scott Graham <scottmg@google.com>
diff --git a/zircon/system/utest/core/threads/threads.cc b/zircon/system/utest/core/threads/threads.cc
index 463f6b3..d77703d 100644
--- a/zircon/system/utest/core/threads/threads.cc
+++ b/zircon/system/utest/core/threads/threads.cc
@@ -794,7 +794,7 @@
   EXPECT_EQ(zx_task_suspend(zx_thread_self(), &suspend_token), ZX_ERR_NOT_SUPPORTED);
 }
 
-TEST(Thread, SuspendAfterDeath) {
+TEST(Threads, SuspendAfterDeath) {
   zxr_thread_t thread;
   zx_handle_t thread_h;
   ASSERT_TRUE(start_thread(threads_test_infinite_sleep_fn, nullptr, &thread, &thread_h));