Merge pull request magento#13 from damienwebdev/2.4-develop

ci: use MAGE_OS_CI_TOKEN as GITHUB_TOKEN

Author: Vinai

.github/workflows/merge-upstream-changes.yml

@@ -13,3 +13,4 @@ jobs:
       matrix: '{ branch: ["2.4-develop"] }'
     secrets:
       DISCORD_WEBHOOK: ${{ secrets.DISCORD_WEBHOOK }}
+      GITHUB_TOKEN: ${{ secrets.MAGE_OS_CI_TOKEN }}