Provide the method to get nke-10k-2023.pdf (#769)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: shaohef

ChatQnA/docker/xeon/README.md

@@ -379,7 +379,15 @@ docker compose -f compose_vllm.yaml up -d
 
    If you want to update the default knowledge base, you can use the following commands:
 
-   Update Knowledge Base via Local File [nke-10k-2023.pdf](https://github.com/opea-project/GenAIComps/blob/main/comps/retrievers/langchain/redis/data/nke-10k-2023.pdf) Upload:
+   Update Knowledge Base via Local File [nke-10k-2023.pdf](https://github.com/opea-project/GenAIComps/blob/main/comps/retrievers/langchain/redis/data/nke-10k-2023.pdf)
+   Click [here](https://raw.githubusercontent.com/opea-project/GenAIComps/main/comps/retrievers/langchain/redis/data/nke-10k-2023.pdf) to download the file via any web browser.
+   Or run this command to get the file on a terminal.
+
+   ```bash
+   wget https://raw.githubusercontent.com/opea-project/GenAIComps/main/comps/retrievers/langchain/redis/data/nke-10k-2023.pdf
+   ```
+
+   Upload:
 
    ```bash
    curl -X POST "http://${host_ip}:6007/v1/dataprep" \