Remove arxiv tag from metadata, add task_categories

This PR updates the YAML metadata:
- Removes the `arxiv` tag, since the arXiv ID should only be referenced in the markdown content.
- Adds `task_categories: [robotics]` to properly categorize this dataset.

The content remains unchanged.

README.md

@@ -1,13 +1,14 @@
 ---
-viewer: false
 language:
 - en
+viewer: false
 tags:
-- arxiv:2609.24749
 - world-model
 - jepa
 - decision-supervision
 - robotics
+task_categories:
+- robotics
 ---
 
 # D-JEPA decision supervision
@@ -108,4 +109,4 @@ Important data semantics:
 The detailed schema and population inventory are inside the ZIP. No personal
 data are intentionally included; observations and decision outcomes originate
 from the recorded simulated tasks. The authors must finalize the dataset license
-and applicable upstream resource terms before external publication.
+and applicable upstream resource terms before external publication.