stings -> strings (the typo, it stings!)

Author: davepeck

peps/pep-0750.rst

@@ -426,7 +426,7 @@ of ``Template`` and ``str``:
 
     name = "World"
     assert (t"Hello " t"World").strings == ("Hello World",)
-    assert (t"Hello " "World").stings == ("Hello World",)
+    assert (t"Hello " "World").strings == ("Hello World",)
     assert ("Hello " t"World").strings == ("Hello World",)