refactor: plugin author field

Author: ruibaby

src/main/resources/plugin.yaml

@@ -6,7 +6,9 @@ spec:
   enabled: true
   version: 1.0.0-alpha.3
   requires: ">=2.0.0-beta.2"
-  author: halo-dev
+  author:
+    name: Halo OSS Team
+    website: https://github.com/halo-dev
   logo: https://halo.run/logo
   homepage: https://github.com/halo-sigs/plugin-sitemap
   displayName: "Sitemap"