docs: add release notes

docs-cn/30-release/01-2.6.md

+---
+title: 2.6
+---
+
+[2.6.0.1](https://github.com/taosdata/TDengine/releases/tag/ver-2.6.0.1)
+
+[2.6.0.0](https://github.com/taosdata/TDengine/releases/tag/ver-2.6.0.0)
\ No newline at end of file

docs-cn/30-release/02-2.4.md

+---
+title: 2.4
+---
+
+[2.4.0.25](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.25)
+
+[2.4.0.24](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.24)
+
+[2.4.0.20](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.20)
+
+[2.4.0.18](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.18)
+
+[2.4.0.16](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.16)
+
+[2.4.0.14](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.14)
+
+[2.4.0.12](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.12)
+
+[2.4.0.10](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.10)
+
+[2.4.0.7](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.7)
+
+[2.4.0.5](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.5)
+
+[2.4.0.4](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.4)
+
+[2.4.0.0](https://github.com/taosdata/TDengine/releases/tag/ver-2.4.0.0)
\ No newline at end of file

docs-cn/30-release/_category_.yml

+label: 发布历史