message: Fix custom-actions source link
diff: @@ -57,7 +57,7 @@ export const createNewFileAction = () => {
  So let's break this down. The `createNewFileAction` is a function that returns a
  `createTemplateAction`, and it's a good place to pass in dependencies which
  close over the `TemplateAction`. Take a look at our
  -[built-in actions](https://github.com/backstage/backstage/blob/7f5716081f45a41dc8a4246134b50c893e15c5e1/../plugins/scaffolder-backend/src/scaffolder/actions/builtin/publish/github.ts)
  +[built-in actions](https://github.com/backstage/backstage/blob/master/plugins/scaffolder-backend/src/scaffolder/actions/builtin)
  for reference.
  We set the type generic to `{ contents: string, filename: string}` which is
  