Update deploy_tre.yml

.github/workflows/deploy_tre.yml

@@ -14,7 +14,7 @@ on:  # yamllint disable-line rule:truthy
       environment:
         description: The environment to run this workflow in
         type: environment
-        default: CICD
+        default: poc
         required: true
 
 # This will prevent multiple runs of this entire workflow.