docs: update repository and documentation links

Update the README and mkdocs.yml to reflect the new repository URL and documentation links. This change aligns with the migration from KelabDev to Kelab organization.

Author: jiacheng.li

README.md

@@ -22,7 +22,7 @@
 
 ## 文档
 
-查看文档：<https://code-runner.kelab.dev>
+查看文档：<https://kelab.github.io/code-runner/>
 
 ## 致谢
 

mkdocs.yml

@@ -1,8 +1,8 @@
 site_name: code-runner
 site_description: 一个运行用户程序的工具，根据判题数据，判定程序运行结果。也可以获取程序运行时间和内存消耗。
 
-repo_name: KelabDev/code-runner
-repo_url: https://github.com/KelabDev/code-runner
+repo_name: Kelab/code-runner
+repo_url: https://github.com/Kelab/code-runner
 
 use_directory_urls: true
 
@@ -35,7 +35,7 @@ plugins:
 extra:
   social:
     - icon: fontawesome/brands/github
-      link: https://github.com/KelabDev
-      name: KelabDev on GitHub
+      link: https://github.com/Kelab
+      name: Kelab on GitHub
 
-copyright: Copyright © 2020 - 2021 KelabDev
+copyright: Copyright © 2020 - 2021 Kelab