Update README.md

README.md

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 ## Changelog
-- **2026-04-30**: Released training and validation data of `MTMC_Tracking_2026`, including synthetic data generated by IsaacSim and Cosmos Transfer.
+- **2026-04-29**: Initial release of `MTMC_Tracking_2026` — 26 scenes, 342 cameras, 28.5 camera-hours of 1080p video, 11.1M 3D boxes / 33.2M 2D boxes, with depth maps; calibration and GT aligned to the 2025 schema. 6 scenes (`Warehouse_001`, `_003`, `_005`, `_007`, `_021`, `_024`) are **Cosmos Transfer 2.5 (CT2.5) augmented** re-renderings of their source scenes (same scene/cameras/calibration/depth/GT, augmented RGB).
 - **2025-07-14**: Provided evaluation tools for both 2024 and 2025 datasets.
 - **2025-06-16**: Corrected rotation and misalignment issues in ground truth and calibration for `MTMC_Tracking_2025` scenes.
 - **2025-04-27**: Added depth maps to all `MTMC_Tracking_2025` scenes.
 - **2025-04-23**: Added 2025-format calibration and ground truth JSON files to all `MTMC_Tracking_2024` scenes.
 - **2025-05-19**: Updated corrupted files (videos and depth maps) in train/val scenes of `MTMC_Tracking_2025`.
 - **2025-05-28**: Added 4 test scenes of `MTMC_Tracking_2025` and provided scene ID table.
-- **2025-06-16**: Updated ground truth and calibration files, and removed misaligned videos and depth maps for train/val scenes in `MTMC_Tracking_2025`.
-- **2026-04-29**: Initial release of `MTMC_Tracking_2026` — 26 scenes, 342 cameras, 28.5 camera-hours of 1080p video, 11.1M 3D boxes / 33.2M 2D boxes, with depth maps; calibration and `object type` aligned to the 2025 schema. 6 scenes (`Warehouse_001`, `_003`, `_005`, `_007`, `_021`, `_024`) are **Cosmos Transfer 2.5 (CT2.5) augmented** re-renderings of their source scenes (same scene/cameras/calibration/depth/GT, augmented RGB).
+- **2025-06-16**: Updated ground truth and calibration files, and removed misaligned videos and depth maps for train/val scenes in `MTMC_Tracking_2025`.