ci: improve status push to discord

.forgejo/actions/push-status-to-discord/action.yml

@@ -14,7 +14,7 @@ outputs:
     description: "ID of the message that was posted, for editing purposes in further calls."
     value: ""
 
-run:
+runs:
   using: "composite"
   steps:
     - name: Setup Python

.forgejo/workflows/ci.yml

@@ -5,6 +5,7 @@ jobs:
   pre-run-notify:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v4
       - uses: ./.forgejo/actions/push-status-to-discord
         with:
           webhook-url: ${{ secrets.DISCORD_WEBHOOK_URL }}