message: docs: Correct URL of techdocs-container
diff: @@ -95,7 +95,7 @@ environment is compatible with techdocs.
  You will have to install the `mkdocs` and `mkdocs-techdocs-core` package from
  pip, as well as `graphviz` and `plantuml` from your OS package manager (e.g.
  apt). See our
  -[Dockerfile](https://github.com/spotify/backstage/blob/master/packages/techdocs-container/Dockerfile)
  +[Dockerfile](https://github.com/backstage/techdocs-container/blob/main/Dockerfile)
  for the latest requirements. You should be trying to match your Dockerfile with
  this one.
  @@ -104,7 +104,7 @@ Note: We recommend Python version 3.7 or higher.
  Caveat: Please install the `mkdocs-techdocs-core` package after all other Python
  packages. The order is important to make sure we get correct version of some of
  the dependencies. For example, we want `Markdown` version to be
  -[3.2.2](https://github.com/spotify/backstage/blob/f9f70c225548017b6a14daea75b00fbd399c11eb/packages/techdocs-container/techdocs-core/requirements.txt#L11).
  +[3.2.2](https://github.com/backstage/backstage/blob/f9f70c225548017b6a14daea75b00fbd399c11eb/packages/techdocs-container/techdocs-core/requirements.txt#L11).
  You can also explicitly install `Markdown==3.2.2` after installing all other
  Python packages.
  