Disable node update

Author: laurit

.github/renovate.json5

@@ -159,6 +159,16 @@
         'com.github.tomakehurst:wiremock-jre8'
       ],
     },
+    {
+      // vaadin 14 tests require node 16
+      matchPackageNames: [
+        'node',
+      ],
+      matchUpdateTypes: [
+        'major',
+      ],
+      enabled: false,
+    },
     {
       // intentionally using Spring Boot 2 in this smoke tests
       // new versions of Spring Boot 3 are tested with