message: TechDocs: docs - Add reference link to techdocs-ref annotation
diff: @@ -71,6 +71,11 @@ metadata:
  # backstage.io/techdocs-ref: url:https://github.com/org/repo/tree/branchName/subFolder
  ```
  +The
  +[`backstage.io/techdocs-ref` annotation](../software-catalog/well-known-annotations.md#backstageiotechdocs-ref)
  +is used by TechDocs to download the documentation source files for generating an
  +Entity's TechDocs site.
  +
  Create a `/docs` folder in the root of the project with at least an `index.md`
  file. _(If you add more markdown files, make sure to update the nav in the
  mkdocs.yml file to get a proper navigation for your documentation.)_
  