add upterm to fatimage workflow

Author: bertiethorpe

.github/workflows/fatimage.yml

@@ -33,6 +33,9 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - name: Setup upterm session
+        uses: lhotari/action-upterm@v1
+
       - name: Setup ssh
         run: |
           set -x