### What this PR does / why we need it? Fix the wrong title of the modelrunner_prepare_inputs docs ### Does this PR introduce _any_ user-facing change? no ### How was this patch tested? pass CI - vLLM version: v0.11.0rc3 - vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0 Signed-off-by: ChenTaoyu-SJTU <ctynb@qq.com>