Update repository secret automatically

[nstratos]

Problem

The GitHub action integration.yml is reading the oauth2 token from the repository secret MAL_OAUTH2_TOKEN.

The oauth2 token eventually expires so the secret needs to be manually updated for the integration tests to keep working.

It would be convenient if the value of the secret was updated with a refreshed token automatically, perhaps through a new GitHub action.

Possible solution

Create a new GitHub action that gets a fresh oauth2 token and updates the respository secret.

• https://stackoverflow.com/questions/72424607/update-a-github-repository-secret-from-a-github-action
• Official docs: https://docs.github.com/en/rest/guides/encrypting-secrets-for-the-rest-api?apiVersion=2022-11-28