test_threaded_import: Fix unittest.main spelling (GH-93114)

miss-islington · The-Compiler · web-flow · commit 02d35fc4ef8a · 2022-05-25T01:17:57.000-07:00
(cherry picked from commit 1971014) Co-authored-by: Florian Bruhin <me@the-compiler.org>
diff --git a/Lib/test/test_importlib/test_threaded_import.py b/Lib/test/test_importlib/test_threaded_import.py
@@ -270,4 +270,4 @@ def setUpModule():
 
 
 if __name__ == "__main__":
-    unittets.main()
+    unittest.main()
