[readme] fix typo

README.md

@@ -185,7 +185,7 @@ seldom used in Python code).
 At any rate, **Late** is so simple and so small that you can apply any changes you like and use it as another part of your code instead of installing it as a library.
 
 
-### How dows it work?
+### How does it work?
 
 For values of immutable types, `__()` will return the same value. For all other types `__()` 
 will wrap the value in a special ``namedtuple(actual=value)``. At function invocation time, this it what happens: