docs: fix broken link on github actions recipe (#2102)

The link to the secrets and environment variables was broken since the documentation changed.
I pointed the link to the URL that made most sense, since users can choose to create the secret wherever they want.

docs/recipes/github-actions.md

@@ -2,7 +2,7 @@
 
 ## Environment variables
 
-The [Authentication](../usage/ci-configuration.md#authentication) environment variables can be configured with [Secret Variables](https://help.github.com/en/articles/virtual-environments-for-github-actions#creating-and-using-secrets-encrypted-variables).
+The [Authentication](../usage/ci-configuration.md#authentication) environment variables can be configured with [Secret Variables](https://docs.github.com/en/actions/reference/encrypted-secrets).
 
 In this example a publish type [`NPM_TOKEN`](https://docs.npmjs.com/creating-and-viewing-authentication-tokens) is required to publish a package to the npm registry. GitHub Actions [automatically populate](https://help.github.com/en/articles/virtual-environments-for-github-actions#github_token-secret) a [`GITHUB_TOKEN`](https://help.github.com/en/articles/creating-a-personal-access-token-for-the-command-line) environment variable which can be used in Workflows.