Type signature of outside on cheat sheet is wrong

The type signature on the cheat sheet says:

```haskell
outside :: Prism s t a b -> Lens (s -> r) (t -> r) (a -> r) (b -> r)
```

But in fact `s` and `t`, and `a` and `b` should be swapped:

```haskell
outside :: Prism s t a b -> Lens (t -> r) (s -> r) (b -> r) (a -> r)
```