docs: update README.md to reflect new Linux kernel requirements and tested OS versions

- Changed the minimum required Linux kernel version from 5.15.0 to 4.19+ for compatibility.
- Added a section listing tested operating systems and their corresponding kernel versions, enhancing clarity for users.

Author: Ghostbaby

README.md

@@ -34,11 +34,19 @@ Shepherd 通过以下机制实现调度延迟监控：
 
 ### 环境要求
 
-- Linux 内核版本 >= 5.15.0
+- 支持 BTF 的 Linux 内核 4.19+
 - 已启用 BTF (Binary Type Format)
 - 已安装 LLVM 和 Clang
 - Go 1.22 或更高版本
 
+已测试的操作系统和内核版本：
+
+- KylinOS 10 SP3 (ARM64) - kernel 4.19.90
+- Ubuntu 24.04 (AMD64) - kernel 6.8.0
+- Ubuntu 22.04 (AMD64) - kernel 5.15.0
+- Alibaba Cloud Linux OS 3 (AMD64) - kernel 5.10.134-16.3.al8
+
+
 ### 初始化 ClickHouse
 
 ```sql