[Bugfix] Leave MiniCPM-o vocoder memory headroom (#5621)

Signed-off-by: lishunyang12 <lishunyang03@gmail.com>
Signed-off-by: SYLAR <125541396+lishunyang12@users.noreply.github.com>
Co-authored-by: lishunyang12 <lishunyang03@gmail.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

examples/online_serving/minicpmo/README.md

@@ -23,9 +23,11 @@ including `librosa`.
 
 The deploy config auto-loads via `--omni`.
 The default `vllm_omni/deploy/minicpmo_4_5.yaml` keeps all three stages on
-logical device 0 with memory budgets of 55%, 22%, and 22%. The profile admits
-at most four sequences per stage and bounds startup video profiling to 32
-frames per video. For throughput,`minicpmo_4_5_2gpu.yaml` gives the Thinker
+logical device 0 with memory budgets of 55%, 15%, and 15%, leaving headroom
+for runtime kernels such as the HiFi-GAN vocoder's cuDNN workspace. The
+profile admits at most four sequences per stage and bounds startup video
+profiling to 32 frames per video. For throughput,
+`minicpmo_4_5_2gpu.yaml` gives the Thinker
 GPU 0 (90%) and colocates the Talker (55%) and Code2Wav (35%) on GPU 1. That
 profile admits at most four concurrent sequences per stage.