Fix StackHPC cloud tests not run except on upgrades

the conjunction produced the string 'false', which broke the run

Author: elelaysh

.github/workflows/stackhpc-all-in-one.yml

@@ -460,7 +460,7 @@ jobs:
             -e KAYOBE_ENVIRONMENT -e KAYOBE_VAULT_PASSWORD -e KAYOBE_AUTOMATION_SSH_PRIVATE_KEY \
             $KAYOBE_IMAGE \
             /stack/kayobe-automation-env/src/kayobe-config/.automation/pipeline/playbook-run.sh '$KAYOBE_CONFIG_PATH/ansible/stackhpc-cloud-tests.yml' \
-            ${{ inputs.upgrade && '-e selinux_state=disabled' }} \
+            ${{ (inputs.upgrade && '-e selinux_state=disabled') || '' }} \
             -e sct_version=${{ inputs.stackhpc_cloud_tests_version }}
         env:
           KAYOBE_AUTOMATION_SSH_PRIVATE_KEY: ${{ steps.ssh_key.outputs.ssh_key }}