Add `license: other` to metadata

This PR adds the `license` field to the dataset card metadata. As the dataset aggregates data from multiple sources, `license: other` is used, with details on referring to the original datasets provided in the content.

README.md

@@ -1,17 +1,18 @@
 ---
+language: en
 task_categories:
-  - keypoint-detection
+- keypoint-detection
 tags:
-  - 3d-tracking
-  - multi-view
-  - point-cloud
-  - computer-vision
-  - robotics
-  - synthetic-data
-  - real-world-data
-  - pytorch
-  - pytorch-hub
-language: en
+- 3d-tracking
+- multi-view
+- point-cloud
+- computer-vision
+- robotics
+- synthetic-data
+- real-world-data
+- pytorch
+- pytorch-hub
+license: other
 ---
 
 # Multi-View 3D Point Tracking Datasets