"sorting the datasets listed in the repo's README"

Author: stephanielees

README.md

@@ -4,7 +4,6 @@ The licences are included in the respective dataset folders as well.
 
 1. [example-causal-datasets](https://github.com/cmu-phil/example-causal-datasets): CC0 1.0 Universal. Last synced on
    2026-02-05.
-2. [Tuebingen-pair-wise-dataset](https://webdav.tuebingen.mpg.de/cause-effect/): Last downloaded on 2026-03-02.
-3. [nslm](https://github.com/grf-labs/grf/tree/master/experiments/acic18): CC0 1.0 Universal. Last downloaded on 2026-03-04.
-
-3.[Twins-datasets](http://www.nber.org/data/linked-birth-infant-death-data-vital-statistics-data.html)
+2. [nslm](https://github.com/grf-labs/grf/tree/master/experiments/acic18): CC0 1.0 Universal. Last downloaded on 2026-03-04.
+3. [Tuebingen-pair-wise-dataset](https://webdav.tuebingen.mpg.de/cause-effect/): Last downloaded on 2026-03-02.
+4. [Twins-datasets](http://www.nber.org/data/linked-birth-infant-death-data-vital-statistics-data.html)