message: fix: wrong type in the deletePicture definition
diff: @@ -86,7 +86,7 @@ Save both of the files we just edited. The Photo Gallery app will reload automat
  In `src/app/services/photo.service.ts`, add the `deletePicture()` function:
  ```tsx
  -public async deletePicture(photo: Photo, position: number) {
  +public async deletePicture(photo: UserPhoto, position: number) {
  // Remove this photo from the Photos reference data array
  this.photos.splice(position, 1);
  