chore: update plugin.yaml (#69)

更新 plugin.yaml 描述文件。

1. 添加 homepage 字段指向应用市场。
2. 添加 repo 字段指向当前仓库
3. 添加 issues 字段指向当前仓库的 issues。
4. 更新插件描述。

```release-note
None
```

src/main/resources/plugin.yaml

@@ -2,17 +2,21 @@ apiVersion: plugin.halo.run/v1alpha1
 kind: Plugin
 metadata:
   name: PluginLinks
+  annotations:
+    "store.halo.run/app-id": "app-hfbQg"
 spec:
   requires: ">=2.15.0"
   author:
-    name: Halo OSS Team
+    name: Halo
     website: https://github.com/halo-dev
   logo: logo.svg
   configMapName: plugin-links-configmap
   settingName: plugin-links-settings
-  homepage: https://github.com/halo-sigs/plugin-links
+  repo: https://github.com/halo-sigs/plugin-links
+  homepage: https://www.halo.run/store/apps/app-hfbQg
+  issues: https://github.com/halo-sigs/plugin-links/issues
   displayName: "链接管理"
-  description: "链接管理模块"
+  description: "链接管理模块，可用于管理网站友情链接。"
   license:
     - name: "GPL-3.0"
       url: "https://github.com/halo-sigs/plugin-links/blob/main/LICENSE"