Disable container image for Ubuntu 20.04 workflow

Comment out the container image specification in the workflow.

Author: gowridurgad

.github/workflows/testing1087.yml

@@ -8,8 +8,8 @@ jobs:
     name: Step 1 - Ubuntu 20.04 container
     runs-on: self-hosted
 
-    container:
-      image: ubuntu:20.04
+    # container:
+    #   image: ubuntu:20.04
 
     steps:
       - name: Install required tools