Update github-actions-demo.yml

Author: rasmusbj

.github/workflows/github-actions-demo.yml

@@ -3,7 +3,7 @@ run-name: ${{ github.actor }} is testing out GitHub Actions 🚀
 on: [push]
 jobs:
   Explore-GitHub-Actions:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     steps:
       - run: echo "🎉 The job was automatically triggered by a ${{ github.event_name }} event."
       - run: echo "🐧 This job is now running on a ${{ runner.os }} server hosted by GitHub!"