docs: update baseline_v8 metrics

Initial upload: baseline_v8 tokenizer | ver: baseline_v8 | Loss: 2.3498 | PPL: 10.48 | BPC: 3.39 (Trained with Unsloth)

Initial upload: baseline_v8 full weights | ver: baseline_v8 | Loss: 2.3498 | PPL: 10.48 | BPC: 3.39 (Trained with Unsloth)

initial commit