Add more precise license metadata (UI will be cleaner!)

Part of hacktoberfest_challenge -> [Hugging Face hub-docs] (https://github.com/huggingface/hub-docs/blob/main/hacktoberfest_challenges/model_license_other.md)

README.md

@@ -2,6 +2,8 @@
 # For reference on model card metadata, see the spec: https://github.com/huggingface/hub-docs/blob/main/modelcard.md?plain=1
 # Doc / guide: https://huggingface.co/docs/hub/model-cards
 license: other
+license_name: bloomchat-176b-license-v1.0
+license_url: https://huggingface.co/sambanovasystems/BLOOMChat-176B-v1/blob/main/LICENSE
 inference: false
 ---