docs: update site URL for documentation

Author: wan92hen

mkdocs.yml

@@ -1,6 +1,6 @@
 ## basic info
 site_name: "1Panel Documentation"
-site_url: "https://docs.1panel.pro"
+site_url: "https://docs.1panel.pro/docs"
 site_description: "1Panel Top-Rated Web-based Linux Server Management Tool"
 repo_name: "1Panel"
 repo_url: "https://github.com/1Panel-dev/1Panel"