Fix wrong documentation for effect events (#7800)

* Fix wrong documentation for effect events

* Update src/content/learn/separating-events-from-effects.md

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Co-authored-by: Ricky <rickhanlonii@gmail.com>

src/content/learn/separating-events-from-effects.md

@@ -439,7 +439,7 @@ function ChatRoom({ roomId, theme }) {
   // ...
 ```
 
-This solves the problem. Note that you had to *remove* `onConnected` from the list of your Effect's dependencies. **Effect Events are not reactive and must be omitted from dependencies.**
+This solves the problem. Note that you had to *remove* `theme` from the list of your Effect's dependencies, because it's no longer used in the Effect. You also don't need to *add* `onConnected` to it, because **Effect Events are not reactive and must be omitted from dependencies.**
 
 Verify that the new behavior works as you would expect: