chore: revert previous node-version template updates (#2114)

* chore: update ci.yaml template

* chore: update ci.yaml template node version

* chore: revert previous node-version template changes

Author: leahecole

synthtool/gcp/templates/node_library/.github/workflows/issues-no-repro.yaml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: actions/setup-node@v4
         with:
-          node-version: 22
+          node-version: 18
       - run: npm install
         working-directory: ./.github/scripts
       - uses: actions/github-script@v7