feat: update Docker run command in Enflame.md and modify gcu.Dockerfile for improved package sources

docs/zh/usage/acceleration_cards/Enflame.md

@@ -22,12 +22,12 @@ docker build --network=host -t mineru:gcu-vllm-latest -f gcu.Dockerfile .
 
 ```bash
 docker run -u root --name mineru_docker \
-      --network=host \
-      --ipc=host \
-      --privileged \
-      -e MINERU_MODEL_SOURCE=modelscope \
-      -it enflame:docker_images_topsrider_i3x_3.6.20260106_vllm0.11 \
-      /bin/bash
+    --network=host \
+    --ipc=host \
+    --privileged \
+    -e MINERU_MODEL_SOURCE=local \
+    -it enflame:docker_images_topsrider_i3x_3.6.20260106_vllm0.11 \
+  /bin/bash
 ```
 
 执行该命令后，您将进入到Docker容器的交互式终端，您可以直接在容器内运行MinerU相关命令来使用MinerU的功能。