fix: update startup command to 'astrbot run' in all README files (#6189)

Updated the quick start command from 'astrbot' to 'astrbot run' across all
language versions of README documentation for consistency and correctness.

Co-authored-by: DroidKali <DroidKali@users.noreply.github.com>
Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

README_zh.md

@@ -78,7 +78,7 @@ AstrBot 是一个开源的一站式 Agentic 个人和群聊助手，可在 QQ、
 ```bash
 uv tool install astrbot
 astrbot init # 仅首次执行此命令以初始化环境
-astrbot
+astrbot run
 ```
 
 > 需要安装 [uv](https://docs.astral.sh/uv/)。