message: docs(aio): fix broken link in toh-pt5
diff: @@ -1207,7 +1207,8 @@ Here's an excerpt:
  Create the file <code>styles.css</code>.
  -Ensure that the file contains the [master styles provided here](https://raw.githubusercontent.com/angular/angular/master/aio/tools/examples/shared/boilerplate/src/styles.css).
  +Ensure that the file contains the [master styles provided here](https://raw.githubusercontent.com/angular/angular/master/aio/tools/examples/shared/boilerplate/common/src/styles.css).
  +
  