Update logic for helm parameters

Author: shaun-nx

.github/workflows/nfr.yml

@@ -134,8 +134,9 @@ jobs:
           echo "GKE_NUM_NODES=12" >> vars.env
           echo "GKE_MACHINE_TYPE=n2d-standard-16" >> vars.env
           echo "PLUS_USAGE_ENDPOINT=${{ secrets.JWT_PLUS_REPORTING_ENDPOINT }}" >> vars.env
-          echo "HELM_PARAMETERS=--set nginx.config.ipFamily=${{ inputs.ipv6_enabled ? 'ipv6' : 'ipv4' }}" >> vars.env
-
+            if [ "${{ inputs.ipv6_enabled }}" = "true" ]; then
+          echo "HELM_PARAMETERS=--set nginx.config.ipFamily=ipv6" >> vars.env
+            fi
       - name: Setup license file for plus
         if: matrix.type == 'plus'
         env: