chore: normalize tsfile dataset metadata

README.md

@@ -3,14 +3,16 @@ license: apache-2.0
 task_categories:
 - robotics
 tags:
-- tsfile
-- timeseries
-- time-series
 - LeRobot
 - robotics
 - cable-insertion
 - imitation-learning
 - manipulation
+- real
+- hdf5
+- hessian
+- tsfile
+- modality:timeseries
 pretty_name: Cable Insertion 2 (TsFile)
 size_categories:
 - 10K<n<100K
@@ -19,6 +21,8 @@ configs:
   data_files:
   - split: train
     path: data/cable_insertion_2.tsfile
+modality:
+- timeseries
 ---
 
 # Cable Insertion 2 (TsFile)