Tweak the words in the footer

Author: kmyk

index.html

@@ -82,7 +82,7 @@
         <hr>
 
         <footer class="container-fluid">
-            <small><a class="text-muted" href="https://github.com/online-judge-tools/template-generator-webapp">GitHub repository for this page</a></small>
+            <small><a class="text-muted" href="https://github.com/online-judge-tools/template-generator-webapp">About this page</a></small>
         </footer>
     </body>
 </html>