librejs.html: fix semantic version (#5404)

currently incompatible with librejs

public/assets/librejs/librejs.html

@@ -16,9 +16,9 @@
         <td><a href="/js/libs/jquery.are-you-sure.js">jquery.are-you-sure.js</a></td>
       </tr>
       <tr>
-        <td><a href="/js/semantic-2.2.7.min.js">semantic-2.2.1.min.js</a></td>
+        <td><a href="/js/semantic-2.3.1.min.js">semantic-2.3.1.min.js</a></td>
         <td><a href="http://www.freebsd.org/copyright/freebsd-license.html">Expat</a></td>
-        <td><a href="https://github.com/Semantic-Org/Semantic-UI/archive/2.2.1.tar.gz">semantic-UI-2.2.1.tar.gz</a></td>
+        <td><a href="https://github.com/Semantic-Org/Semantic-UI/archive/2.3.1.tar.gz">semantic-UI-2.3.1.tar.gz</a></td>
       </tr>
       <tr>
         <td><a href="/js/gogs.js">gogs.js</a></td>