fix(Chapter_05): add recipe id to recipes.json

Chapter 5 code reads an `id` from the JSON map data, but there is no
such field. It doesn’t really affect the functionality since the id is
not used until the next chapter. The `id` field is present in Chapter
6, hence this change also eliminates an unnecessary difference with
Chapter 6.
Merge pull request #95 from chalin/patch-0304-chap5-json-recipe-id

fix(Chapter_05): add recipe id to recipes.json