Take 2, fix GitHub actions yml

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

@@ -1,20 +1,21 @@
 name: GitHub Actions
-run-name: ${{ github.actor }} is running a workflow on GitHub actions.
-on: [push, pull-request]
+on:
+  push:
+  pull_request:
 jobs:
   Run linter:
     runs-on: ubuntu-latest
     steps:
       - run: echo "The job was automatically triggered by a ${{ github.event_name }} event."
       - run: echo "The name of your branch is ${{ github.ref }} and your repository is ${{ github.repository }}."
       - name: Check out repository code
-        uses: actions/checkout@main
+        uses: actions/checkout@v2 # Corrected "main" to "v2"
       - run: echo "The ${{ github.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 ${{ github.workspace }}
       - name: Run linter
-	run: |
-	  /linting-testing-workflow/linter.sh
-      - run: echo "This job's status is ${{ job.status }}."
+        run: |
+          /linting-testing-workflow/linter.sh
+      - run: echo "This job's status is ${{ job.status }}."