Fail curl command if return code is not OK

Author: mcasperson

.github/workflows/test-initdemo.yaml

@@ -17,5 +17,5 @@ jobs:
         run: ./initdemo.sh
       - name: Test projects exist
         run: |
-          curl -H "X-Octopus-ApiKey: API-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" http://localhost:18080/api/Spaces-1/Projects/hello-world
+          curl --fail -H "X-Octopus-ApiKey: API-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" http://localhost:18080/api/Spaces-1/Projects/hello-world
           if [[ $? != "0" ]]; then exit 1; fi