message: docs: update per tech review
  Update content per feedback in tech review.
  PR Close
diff: @@ -16,7 +16,7 @@ For an example, see the [Angular Material][AngularMaterialMain] documentation.
  ### Library typings
  -Library packages often include typings in `.d.ts` files; see examples in `node_modules/@angular/material`.
  +Typicaly, library packages include typings in `.d.ts` files; see examples in `node_modules/@angular/material`.
  If the package of your library does not include typings and your IDE complains, you might need to install the `@types/<lib_name>` package with the library.
  For example, suppose you have a library named `d3`:
  @@ -187,4 +187,4 @@ If you do not add the interface for the script-defined extension, your IDE shows
  <!-- end links -->
  -@reviewed 2021-10-27
  +@reviewed 2021-10-9
  