ELI-338: Fixing proxygen list cmd with awk

Author: shweta-nhs

.github/workflows/preprod_publish_deploy.yaml

@@ -61,8 +61,9 @@ jobs:
         run: |
           proxygen spec publish build/specification/preprod/eligibility-signposting-api.yaml --uat --no-confirm
       - name: Get list of environments
+        id: get_envs
         run: |
-          ENVS=$(proxygen instance list)
+          ENVS=$(proxygen instance list | awk 'NR>2 {print $1}' | paste -sd "," -)
           echo "envs=$ENVS" >> $GITHUB_OUTPUT
       - name: Deploy preprod spec to Proxygen
         run: |