Update README.md

Update README.md

Rename unsloth.Q5_K_M.gguf to HexotericL4bfKaa6TRH128a32RSe4-7B.Q5_K_M.gguf

(Trained with Unsloth)

(Trained with Unsloth)

(Trained with Unsloth)

(Trained with Unsloth)

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