Revert "Upgrade NodeJS version in CI/CD from 16 to 18"

Only until I upgrade the demo code to use a more recent version of NodeJS

Author: D-Pow

.github/workflows/ci.yaml

@@ -35,7 +35,7 @@ env:
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   gitUserName: ${{ github.actor }}
   gitUserEmail: ${{ github.actor }}@users.noreply.github.com
-  nodeVersion: 18
+  nodeVersion: 16
   clientVersion: ""