[CI] Fix PD mooncake dependency error (sgl-project#6212)

Signed-off-by: Shangming Cai <[email protected]>

Author: ShangmingCai

scripts/ci_install_dependency.sh

@@ -20,7 +20,7 @@ pip install -e "python[all]"
 
 # Install additional dependencies
 pip install torch_memory_saver
-pip install transformers==4.51.0 timm torchaudio==2.6.0 sentence_transformers accelerate peft pandas datasets mooncake-transfer-engine
+pip install transformers==4.51.0 timm torchaudio==2.6.0 sentence_transformers accelerate peft pandas datasets mooncake-transfer-engine==0.3.0
 
 # For compiling xgrammar kernels
 pip install cuda-python nvidia-cuda-nvrtc-cu12