Update instance repo from cookiecutter template

Author: github-actions[bot]

docs/template_usage.md

@@ -90,13 +90,8 @@ Coverage tells what fraction of the code is "covered" by unit tests, thereby enc
 To enable coverage checks, head over to [codecov][] and sign in with your GitHub account.
 You'll find more information in the "quick start" section of the [codecov docs][].
 
-Most importantly, you **must add a codecov token to your repository secrets** for the job to succeed:
-
-1. Activate Codecov for the repo by clicking _Configure_ in the codecov dashboard.
-2. Go to _Configuration > General_ and copy **only** the token `_______-____-...`.
-3. Go to _Settings_ of your newly created repository on GitHub.
-4. Go to _Security > Secrets > Actions_.
-5. Create new repository secret with name `CODECOV_TOKEN` and paste the token generated by codecov.
+Most importantly, you **must add a codecov token to your repository secrets** for the job to succeed.
+A step-by-step guide is shown in in [adding the codecov token][codecov token].
 
 If you want codecov to comment on pull requests, you can  make use of the [codecov bot][].
 To set it up, simply go to the [codecov app][] page and follow the instructions to activate it for your repository.