<update>: update readme

README.md

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+The Open-Vocabulary SUN-RGBD datasets from CoDA and CoDAv2.
+
+If the dataset is helpful, please cite:
+
+```
+@inproceedings{dai2017scannet,
+    title={ScanNet: Richly-annotated 3D Reconstructions of Indoor Scenes},
+    author={Dai, Angela and Chang, Angel X. and Savva, Manolis and Halber, Maciej and Funkhouser, Thomas and Nie{\ss}ner, Matthias},
+    booktitle = {Proc. Computer Vision and Pattern Recognition (CVPR), IEEE},
+    year = {2017}
+}
+
+@inproceedings{cao2023coda,
+  title={CoDA: Collaborative Novel Box Discovery and Cross-modal Alignment for Open-vocabulary 3D Object Detection},
+  author={Cao, Yang and Zeng, Yihan and Xu, Hang  and  Xu, Dan},
+  booktitle={NeurIPS},
+  year={2023}
+}
+
+@article{cao2024collaborative,
+      title={Collaborative Novel Object Discovery and Box-Guided Cross-Modal Alignment for Open-Vocabulary 3D Object Detection}, 
+      author={Yang Cao and Yihan Zeng and Hang Xu and Dan Xu},
+    journal={arXiv preprint arXiv:2406.00830},
+    year={2024}
+}
+```