fix(docker_test): 修复插件测试获取到的插件元数据主页为空时报错的问题

[he0119]

NoneBot 中是允许 homepage 为空的。

@dataclass(eq=False)
class PluginMetadata:
    """插件元信息，由插件编写者提供"""

    name: str
    """插件名称"""
    description: str
    """插件功能介绍"""
    usage: str
    """插件使用方法"""
    type: Optional[str] = None
    """插件类型，用于商店分类"""
    homepage: Optional[str] = None
    """插件主页"""
    config: Optional[Type[BaseModel]] = None  # noqa: UP006
    """插件配置项"""
    supported_adapters: Optional[set[str]] = None
    """插件支持的适配器模块路径

    格式为 `<module>[:<Adapter>]`，`~` 为 `nonebot.adapters.` 的缩写。

    `None` 表示支持**所有适配器**。
    """
    extra: dict[Any, Any] = field(default_factory=dict)
    """插件额外信息，可由插件编写者自由扩展定义"""

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.50%. Comparing base (f7eee94) to head (6937f33).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #280   +/-   ##
=======================================
  Coverage   87.50%   87.50%           
=======================================
  Files          37       37           
  Lines        1992     1992           
=======================================
  Hits         1743     1743           
  Misses        249      249           

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