Add pipeline tag and link to Github repository

This PR adds the `pipeline_tag: text-generation` to the metadata so the model can be found at https://huggingface.co/models?pipeline_tag=text-generation. It also adds a link to the Github repository for easier access to the code.

README.md

@@ -1,15 +1,19 @@
 ---
-library_name: transformers
-license: mit
 datasets:
 - HuggingFaceH4/ultrafeedback_binarized
 language:
 - en
+library_name: transformers
+license: mit
+pipeline_tag: text-generation
 ---
+
 # Zephyr-7B-DICE-Iter2
 
 This model was developed using [Bootstrapping Language Models with DPO Implicit Rewards](https://arxiv.org/abs/2406.09760) (DICE) at iteration 2, based on the [HuggingFaceH4/zephyr-7b-beta](https://huggingface.co/HuggingFaceH4/zephyr-7b-beta) as the starting point.
 
+Code: https://github.com/sail-sg/dice
+
 ## Links to Other Models
 - [Zephyr-7B-DICE-Iter1](https://huggingface.co/sail/Zephyr-7B-DICE-Iter1)
 - [Zephyr-7B-DICE-Iter2](https://huggingface.co/sail/Zephyr-7B-DICE-Iter2)