chore(Dockerfile.latest): comment out the sed command to replace apt source with tuna mirror

The sed command to replace the apt source with the tuna mirror has been commented out. This is because the command is not necessary for the current build and may cause issues in the future.

docker/Dockerfile.latest

@@ -6,7 +6,7 @@ ARG TZ='Asia/Shanghai'
 ARG CHATGPT_ON_WECHAT_VER
 
 RUN echo /etc/apt/sources.list
-RUN sed -i 's/deb.debian.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list
+# RUN sed -i 's/deb.debian.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list
 ENV BUILD_PREFIX=/app
 
 ADD . ${BUILD_PREFIX}