[skip ci][Doc] Small fix of Doc (#2400)

Signed-off-by: Didan Deng <33117903+wtomin@users.noreply.github.com>

docs/user_guide/diffusion/cache_acceleration/cache_dit.md

@@ -164,7 +164,7 @@ cache_config={
 
 **Performance Tips**:
 
-- Default `Fn_compute_blocks=1` works well for most cases. Some models (e.g., [FLUX.2-klein](https://github.com/wtomin/vllm-omni/blob/main/vllm_omni/diffusion/cache/cache_dit_backend.py#L363)) use a larger value for `Fn_compute_blocks` for a balanced performance.
+- Default `Fn_compute_blocks=1` works well for most cases. Some models (e.g., FLUX.2-klein) use a larger value for `Fn_compute_blocks` for a balanced performance.
 - Increase `residual_diff_threshold` (e.g., 0.12-0.15) for faster inference with slight quality trade-off, or decrease from default 0.24 for higher quality.
 - Default `max_warmup_steps=4` is optimized for few-step models. Increase to 6-8 for more steps if needed.