chore: typo

README.md

@@ -47,10 +47,10 @@ let c = sum(a, b) // c = a + b = 3
 
 set(a, 2) // shorthand for a.value = 2
 
-log(c) // it's 4!
+log(c) // it's 4 (2 + 2)!
 ```
 
-### Cool, but, but how is that possible?
+### Cool, but, how is that possible?
 
 We are basically making functions accepting [`Ref`](https://v3.vuejs.org/api/refs-api.html#refs) as their arguments and then wrapper their result with [`computed`](https://v3.vuejs.org/guide/reactivity-computed-watchers.html#computed-and-watch). This makes them automatically collect dependency sources and re-evaluate when the sources get changed. Note that the `ComputedRef` is also a `Ref` which means the operations are chainable!