@see annotation surrounds unknown symbols with tilde "~" (strikethrough)

还没有人认领这个 Issue。

### How are you using the lua-language-server?

Nvim

### Which OS are you using?

MacOS

### What is the issue affecting?

Hover

### Expected Behaviour

code should be able to use `@see` annotations that don't necessarily map to a known symbol.

### Actual Behaviour

unknown symbols are rendered as "strikethrough": https://github.com/LuaLS/lua-language-server/blob/8c32d8f95f28f8bc064533031898abfb7dea58b0/script/core/hover/description.lua#L144

### Reproduction steps

1. add a `@see bogus` annotation
2. hover the annotation in any LSP client

### Additional Notes

_No response_

### Log File

_No response_

从 script/core/hover/description.lua 第 144 行附近开始，然后使用错误的 @see 注解重现该问题，并在 LSP 客户端中将鼠标悬停在其上。确认对无法解析的 @see 符号的处理，并验证完成后的行为不再将未知符号渲染为带删除线的形式。

由索引模型根据 Issue 内容生成。