fix: test for windows

Author: holgern

tests/test_sync_concurrency.py

@@ -495,7 +495,7 @@ async def resume_later():
             elapsed = time.time() - start
 
             assert result is True
-            assert elapsed >= 0.1
+            assert elapsed >= 0.09  # Allow small timing variance
             assert elapsed < 0.5
 
             await task