chore: update plugin.yaml (#30)

更新 plugin.yaml。

- 将 homepage 字段指向到应用市场。
- 添加 repo 和 issues 字段。


```release-note
None
```

src/main/resources/plugin.yaml

@@ -11,13 +11,16 @@ spec:
   version: 1.1.1
   requires: ">=2.7.0"
   author:
-    name: Halo OSS Team
+    name: Halo
     website: https://github.com/halo-dev
   logo: logo.svg
   settingName: plugin-feed-setting
   configMapName: plugin-feed-config
-  homepage: https://github.com/halo-dev/plugin-feed
+  homepage: https://www.halo.run/store/apps/app-KhIVw
+  repo: https://github.com/halo-dev/plugin-feed
+  issues: https://github.com/halo-dev/plugin-feed/issues
   displayName: "RSS"
   description: "为站点生成 RSS 订阅链接"
   license:
     - name: "GPL-3.0"
+      url: "https://github.com/halo-dev/plugin-feed/blob/ruibaby-patch-1/LICENSE"