Update repo description

Author: adrien1018

app/views/about/index.html.erb

@@ -4,7 +4,7 @@
 <div class="well">
 This site is powered by Ruby on Rails! <br >
 TIOJ Github Repo: <a href="https://github.com/TIOJ-INFOR-Online-Judge/tioj">https://github.com/TIOJ-INFOR-Online-Judge/tioj</a> <br>
-miku Github Repo: <a href="https://github.com/TIOJ-INFOR-Online-Judge/miku">https://github.com/TIOJ-INFOR-Online-Judge/miku</a> <br>
+Judge System Github Repo: <a href="https://github.com/TIOJ-INFOR-Online-Judge/tioj-judge">https://github.com/TIOJ-INFOR-Online-Judge/tioj-judge</a> <br>
 Still in development, any issues or pull requests are welcomed. <br >
 </div>
 <h5>Contributors</h5>