Update upload-model-to-dockerhub.yml

Fix the bash script and environment setting in the workflow.

.github/workflows/upload-model-to-dockerhub.yml

@@ -100,19 +100,20 @@ jobs:
       - name: Test Built Image
         id: testBuiltImage
         run: |
-          export PULL_IMAGE=n
           ersilia -v fetch ${{ github.event.repository.name }} --from_dockerhub
           ersilia -v serve ${{ github.event.repository.name }}
           ersilia -v run -i "CCCC" -o "output.json"
           expected=$(jq '.[0].output.outcome[]' output.json | wc -l)
           result=$(jq '.[0].output.outcome[] | select(. != null)' output.json | wc -l)
           echo "Expected correct outcomes $expected"
           echo "Returned correct outcomes $result"
-          if [ $expected -ne $ $result ]
+          if [ $expected -ne $result ]
             then
               echo "Error in model output, aborting build and push"
               exit 1
           fi
+        env:
+          PULL_IMAGE: n
 
       - name: Build and push
         id: buildMultiple