message: docs: fixed typo for toh-pt5.md
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diff: @@ -46,7 +46,7 @@ Replace it with the following:
  First, `AppRoutingModule` imports `RouterModule` and `Routes` so the app can have routing functionality. The next import, `HeroesComponent`, will give the Router somewhere to go once you configure the routes.
  -Notice that the `CommonModule` references and `declarations` array are unecessary, so are no
  +Notice that the `CommonModule` references and `declarations` array are unnecessary, so are no
  longer part of `AppRoutingModule`. The following sections explain the rest of the `AppRoutingModule` in more detail.
  