### What this PR does / why we need it?
This PR aims to update `target_probs` to `target_logits` in
`rejection_sample`, for catching up with
https://github.com/vllm-project/vllm/pull/32852. Otherwise, sampling
with temperature will incur accuracy problem where tokens can be
accepted or rejected unreasonably.
### Does this PR introduce _any_ user-facing change?
N/A
### How was this patch tested?
by ci
- vLLM version: v0.15.0
- vLLM main:
13397841ab
Signed-off-by: Zetong Li <slippersss@126.com>