docs: update LICENSE section

Author: billyyyyy3320

README.md

@@ -47,8 +47,11 @@ Please head [documentation](https://vuepress-plugin-blog.ulivz.com/) to see all
 Feel free to add yours here...
 
 
-## Author
 
-**@vuepress/theme-blog** © [ULIVZ](https://github.com/ulivz), Released under the [MIT](./LICENSE) License.<br>
+## LICENSE
+
+**@vuepress/plugin-blog** © [ULIVZ](https://github.com/ulivz) & [Billyyyyy3320](https://github.com/billyyyyy3320), Released under the [MIT](./LICENSE) License.<br>
 
 > [github.com/ulivz](https://github.com/ulivz) · GitHub [@ULIVZ](https://github.com/ulivz) · Twitter [@_ulivz](https://twitter.com/_ulivz)
+
+> [github.com/billyyyyy3320](https://github.com/billyyyyy3320) · GitHub [@Billyyyyy3320](https://github.com/billyyyyy3320)