This PR updates the dataset card for SYNCR to include:
- A link to the paper: [SYNCR: A Cross-Video Reasoning Benchmark with Synthetic Grounding](https://huggingface.co/papers/2605.08412).
- A link to the official GitHub repository.
- Updated `task_categories` to `video-text-to-text`.
- A sample usage section with code snippets for data generation found in the GitHub README.