Update feature_bootmagic.md (#4290)

Fix typo

docs/feature_bootmagic.md

@@ -14,7 +14,7 @@ On some keyboards Bootmagic is disabled by default. If this is the case, it must
 BOOTMAGIC_ENABLE = full
 ```
 
-?> You may see `yes` being used in place of `full`, and this is okay. However, `yes` is deprecated, and ideally `full` (or `lite`) ideally should be used instead.
+?> You may see `yes` being used in place of `full`, and this is okay. However, `yes` is deprecated, and ideally `full` (or `lite`) should be used instead.
 
 Additionally, you can use [Bootmagic Lite](#bootmagic-lite) (a scaled down, very basic version of Bootmagic) by adding the following to your `rules.mk` file: