Typo

[lucas-deangelis]

In the v2 branch, notes, 6-guard-and-extreme-types, line 32:

28 * (3) When to use `unknown`
29 * Unknowns are good for "private" values that we don't want to expose through a public API.
30 * They can still hold any value, we just must narrow the type before we're able to use it.
31 *
32 * We'll do htis with a type guard.
33 */

I suppose that it should be "We'll do this with a type guard."