chore: use lowest node version we support for smoke test (#1837)

Author: SimenB

.github/workflows/smoke-test.yml

@@ -22,7 +22,8 @@ jobs:
           persist-credentials: false
       - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
         with:
-          node-version: 'lts/*'
+          # This is set to the lowest Node.js version we support
+          node-version: 20
           cache: 'yarn'
       - run: |
           yarn install