Arnval Sorry for the off-target answer from Spinebot! It was confusing, so I deleted it.
The builds that were compatible with older versions of Spine are no longer available for direct download, so you will need to compile the Godot editor and export templates from source yourself. The following section of the documentation explains how to do this:
spine-godot 运行时文档 #通过源代码编译Godot编辑器和导出模板
For your information, spine-godot was released after the release of Spine 4.1, so please be aware that if your Spine project is older than that, it cannot be used with spine-godot. For example, Spine skeleton data created with Spine 2.1.27 will not be available in Godot unless you upgrade to at least Spine 4.1.