switch check and lint to node 20

.github/workflows/test-and-release.yml

@@ -28,7 +28,7 @@ jobs:
         steps:
             - uses: ioBroker/testing-action-check@v1
               with:
-                  node-version: '18.x'
+                  node-version: '20.x'
                   # Uncomment the following line if your adapter cannot be installed using 'npm ci'
                   # install-command: 'npm install'
                   lint: true