pip 安装包的时候 ，不更新指定的包，例如安装llamafactory ，不更新transformers

pip 安装包的时候 不更新指定的包例如安装llamafactory 不更新transformerspipinstallllamafactory0.9.5\torch$(python-cimport torch;print(torch.__version__))\transformers$(python-cimport transformers;print(transformers.__version__))\accelerate$(python-cimport accelerate;print(accelerate.__version__))\peft$(python-cimport peft;print(peft.__version__))\datasets$(python-cimport datasets;print(datasets.__version__))\tokenizers$(python-cimport tokenizers;print(tokenizers.__version__))\safetensors$(python-cimport safetensors;print(safetensors.__version__))\trl$(python-cimport trl;print(trl.__version__))\huggingface-hub$(python-cimport huggingface_hub;print(huggingface_hub.__version__))\--upgrade-strategy only-if-needed