Add task_categories metadata to dataset card

This PR adds the missing `task_categories` field to the YAML metadata, ensuring the dataset is correctly categorized on the Hugging Face Hub. No other content changes are made.

README.md

@@ -1,15 +1,18 @@
 ---
-license: mit
-pretty_name: InteractBench
 language:
 - en
+license: mit
+pretty_name: InteractBench
 tags:
 - code
 - benchmark
 - competitive-programming
 - interactive
 - llm-evaluation
+task_categories:
+- text-generation
 ---
+
 # InteractBench Dataset
 
 Dataset artifacts for **InteractBench: Benchmarking LLMs on Competitive Programming under Unrevealed Information** (ICML 2026).
@@ -48,4 +51,4 @@ License: MIT.
   year      = {2026},
   url       = {https://openreview.net/forum?id=Y4T4w0Tj0l}
 }
-```
+```