Update .forgejo/workflows/demo.yaml

Signed-off-by: Daholli <christoph.hollizeck@hey.com>

.forgejo/workflows/demo.yaml

@@ -12,13 +12,11 @@ jobs:
 
     steps:
       - run: echo "🎉 The job was automatically triggered by a ${{ gitea.event_name }} event."
-      - run: echo "🐧 This job is now running on a ${{ runner.os }} server hosted by Gitea!"
       - run: echo "🔎 The name of your branch is ${{ gitea.ref }} and your repository is ${{ gitea.repository }}."
       - name: Check out repository code
         uses: actions/checkout@v4
-      - run: echo "💡 The ${{ gitea.repository }} repository has been cloned to the runner."
-      - run: echo "🖥️ The workflow is now ready to test your code on the runner."
       - name: List files in the repository
         run: |
           ls ${{ gitea.workspace }}
-      - run: echo "🍏 This job's status is ${{ job.status }}."
+      - name: Update flake
+        run: nix flake update