[Docs] Fix typo in Userspace doc (#5871)

* typo

* Update docs/feature_userspace.md

Co-Authored-By: fauxpark <fauxpark@gmail.com>

docs/feature_userspace.md

@@ -110,7 +110,7 @@ QMK has a bunch of [functions](custom_quantum_functions.md) that have [`_quantum
 However, you can actually add support for keymap version, so that you can use it in both your userspace and your keymap! 
 
 
-For instance, lets looks at the `layer_state_set_user` function.  Lets enable the [Tri Layer State](ref_functions.md#olkb-tri-layers) functionalitly to all of our boards, and then still have your `keymap.c` still able to use this functionality. 
+For instance, let's look at the `layer_state_set_user()` function.  You can enable the [Tri Layer State](ref_functions.md#olkb-tri-layers) functionality on all of your boards, while also retaining the Tri Layer functionality in your `keymap.c` files. 
 
 In your `<name.c>` file, you'd want to add this: 
 ```c