update yaml file to run on custom github runner

Author: chadhat

.github/workflows/test.yml

@@ -2,7 +2,7 @@ name: GitHub Actions Demo
 on: [push]
 jobs:
   Explore-GitHub-Actions:
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, linux, X64]
     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!"