Fix linting issue

In the final version of noteReducer.js in Part 6c, use deconstructed createNote so no-unused-vars warning from ESLint wouldn't appear

Author: gobbledyglomp

src/content/6/en/part6c.md

@@ -526,7 +526,7 @@ export const initializeNotes = () => {
 export const appendNote = (content) => {
   return async (dispatch) => {
     const newNote = await noteService.createNew(content)
-    dispatch(noteSlice.actions.createNote(newNote))
+    dispatch(createNote(newNote))
   }
 }
 // highlight-end

src/content/6/fi/osa6c.md

@@ -525,7 +525,7 @@ export const initializeNotes = () => {
 export const appendNote = (content) => {
   return async (dispatch) => {
     const newNote = await noteService.createNew(content)
-    dispatch(noteSlice.actions.createNote(newNote))
+    dispatch(createNote(newNote))
   }
 }
 // highlight-end