docs: update model card

README.md

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+---
+license: mit
+datasets:
+- conll2003
+language:
+- en
+metrics:
+- f1
+library_name: peft
+pipeline_tag: token-classification
+tags:
+- unsloth
+- llama-2
+---
+
+At the moment of writing the 🤗 transformers library doesn't have a Llama implementation for Token Classification ([although there is a open PR](https://github.com/huggingface/transformers/pull/29878)).
+
+This model is based on a [implementation](https://github.com/huggingface/transformers/issues/26521#issuecomment-1868284434) by community member [@KoichiYasuoka](https://github.com/KoichiYasuoka).
+
+* Base Model: `unsloth/llama-2-7b-bnb-4bit`
+* LORA Model Adaptation with rank 8 and alpha 32, other adapter configurations can be found in [`adapter_config.json`](https://huggingface.co/SauravMaheshkar/unsloth-llama-2-7b-bnb-4bit-conll2003-rank-4/blob/main/adapter_config.json)
+
+This model was only trained for a single epoch, however a notebook is made available for those who want to train on other datasets for longer.