docs: change website domain to tianji.dev

Author: moonrailgun

website/docusaurus.config.ts

@@ -17,7 +17,7 @@ const config: Config = {
   favicon: 'img/favicon.ico',
 
   // Set the production url of your site here
-  url: 'https://tianji.msgbyte.com',
+  url: 'https://tianji.dev',
   // Set the /<baseUrl>/ pathname under which your site is served
   // For GitHub pages deployment, it is often '/<projectName>/'
   baseUrl: '/',