This PR is to correct the env variable names in chatqna example on ROCm platform passing to the docker container of TGI and TEI. For tgi, either HF_TOKEN and HUGGING_FACE_HUB_TOKEN could be parsed in TGI while HF_API_TOKEN can be parsed in TEI. TGI: https://github.com/huggingface/text-generation-inference/blob/main/router/src/server.rs#L1700C1-L1702C15 TEI: https://github.com/huggingface/text-embeddings-inference/blob/main/router/src/main.rs#L112 Signed-off-by: Wang, Kai Lawrence <kai.lawrence.wang@intel.com>