Minor fix required in ReadME

[merveguel]

Describe the issue linked to the documentation

Hi,

Shared path for classification and regression checkpoints appear to incorrect, possibly changed at a later point.

Current, active:
https://huggingface.co/Prior-Labs/tabpfn_3/blob/main/tabpfn-v3-classifier-v3_20260417_binary.ckpt

In ReadME:
https://huggingface.co/Prior-Labs/tabpfn_3/blob/main/tabpfn-v3-classifier-20260506.ckpt

Best,
Merve

Suggest a potential alternative/fix

No response