Update syllabus.md

Author: suchzheng2

syllabus.md

@@ -82,7 +82,7 @@ Please see [last year's syllabus](http://cbb752b23.gersteinlab.org/syllabus) (wi
 | 25m9c                        | Unsupervised Data Mining - SVD | [x](https://files.gersteinlab.org/public-docs/2025/03.03/cbb752-25m9c--ML-unsupervised-SVD-core.pdf) | [x](https://files.gersteinlab.org/public-docs/2025/03.03/cbb752-25m9c--ML-unsupervised-SVD-core.pptx) | [](https://youtu.be/UdtzKBp8VH0)[](https://youtu.be/UdtzKBp8VH0) | [](http://files.gersteinlab.org/media/videos/BioDataSciMiningModeling-Lecture_default.cbb752b21-17mar21.09c-SVD.onweb.mp4)[25m9c](https://files.gersteinlab.org/public-docs/2025/03.17/cbb752-25m9c--ML-unsupervised-SVD-core.mp4)|
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 | 25m9e                        | Single Cell Analysis | [x](https://files.gersteinlab.org/public-docs/2025/03.17/cbb752-25m9e-singlecell.pptx) | [x](https://files.gersteinlab.org/public-docs/2025/03.17/cbb752-25m9e-singlecell.pdf)  |  | [](http://files2.gersteinlab.org/public-docs/2023/02.22/23m9e--cbb752-MG-spr23-singlecell.mp4)[23m9e](http://files2.gersteinlab.org/public-docs/2023/02.22/23m9e--cbb752-MG-spr23-singlecell.mp4) |
-| 25t1                         | Single Cell part 2 |  |  |  | [](http://files.gersteinlab.org/public-docs/2023/04.27/DB_lecture.mp4)[23t1](http://files.gersteinlab.org/public-docs/2023/04.27/DB_lecture.mp4) |
+| 25t1                         | Single Cell part 2 | [x](https://files.gersteinlab.org/public-docs/2025/03.24/DB_singlecell.pdf) | [x](https://files.gersteinlab.org/public-docs/2025/03.24/DB_singlecell.pptx)  |  | [](http://files.gersteinlab.org/public-docs/2023/04.27/DB_lecture.mp4)[23t1](http://files.gersteinlab.org/public-docs/2023/04.27/DB_lecture.mp4) |
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 | 25t2                         | Image Analysis | [x](https://files.gersteinlab.org/public-docs/2025/03.10/cbb752b25_25t2.pdf) | [x](https://files.gersteinlab.org/public-docs/2025/03.10/cbb752b25_25t2.pptx) |  | |
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