Merge pull request #42320 from etcwilde/ewilde/fix-async-task-priority

Fix `async_task_priority.swift` test failure

Author: etcwilde

test/Concurrency/async_task_priority.swift

@@ -3,6 +3,7 @@
 // RUN: %target-codesign %t/async_task_priority
 // RUN: %target-run %t/async_task_priority
 
+// REQUIRES: VENDOR=apple
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: libdispatch
@@ -12,7 +13,7 @@
 // UNSUPPORTED: back_deployment_runtime
 
 import Darwin
-@_predatesConcurrency import Dispatch
+@preconcurrency import Dispatch
 import StdlibUnittest
 
 func loopUntil(priority: TaskPriority) async {