docs: add hostname

Author: Mister-Hope

docs/.vuepress/config.ts

@@ -130,6 +130,7 @@ export default defineUserConfig({
       },
     }),
     feedPlugin({
+      hostname: 'https://ecosystem.vuejs.press',
       atom: true,
       json: true,
       rss: true,

docs/.vuepress/theme.ts

@@ -8,6 +8,7 @@ export default defaultTheme({
   logo: '/images/hero.png',
   repo: 'vuepress/ecosystem',
   docsDir: 'docs',
+  hostname: 'https://ecosystem.vuejs.press',
 
   // theme-level locales config
   locales: {