Fix linting: Add missing trailing newline to testingNodeRendererConfigs.ts

Prettier requires all files to end with a newline character.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: AbanoubGhadban

packages/react-on-rails-pro-node-renderer/tests/testingNodeRendererConfigs.ts

@@ -47,4 +47,3 @@ export function createTestConfig(testName: string): { config: Partial<Config>; b
 
   return { config, bundlePath };
 }
-