Fix TGI image HF_TOKEN environment variable rename (opea-project#2059)

Signed-off-by: Wang, Xigui <xigui.wang@intel.com>

Author: xiguiw

DocSum/docker_compose/intel/cpu/xeon/compose_tgi.yaml

@@ -14,7 +14,7 @@ services:
       http_proxy: ${http_proxy}
       https_proxy: ${https_proxy}
       TGI_LLM_ENDPOINT: ${TGI_LLM_ENDPOINT}
-      HUGGINGFACEHUB_API_TOKEN: ${HF_TOKEN}
+      HF_TOKEN: ${HF_TOKEN}
       host_ip: ${host_ip}
     healthcheck:
       test: ["CMD-SHELL", "curl -f http://localhost:80/health || exit 1"]