ci: Switch to Node.js 20 by default. Add initial support for Node.js 22 (#9501)

.github/workflows/release-push-to-channel.yml

@@ -22,9 +22,9 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/setup-node@v4.0.1
+      - uses: actions/setup-node@v4.0.2
         with:
-          node-version: 18.x
+          node-version: 20.x
       - run: |
           echo "//registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }}" > ~/.npmrc
           npm dist-tag add n8n@${{ github.event.inputs.version }} ${{ github.event.inputs.release-channel }}