overridden: OpeningHours: Add library and desk location links

ui/src/overridden/frontsite/OpeningHours/OpeningHoursDetails.js

@@ -1,21 +1,36 @@
 import React from "react";
 import { Header, Message } from "semantic-ui-react";
 
+const libraryLocation = (
+  <a
+    href="https://maps.cern.ch/?n=[%273/1-003%27,%2752/1-052%27,%2752/1-204%27]"
+    target="_blank"
+    rel="noreferrer"
+  >
+    <b>52/1-052</b>
+  </a>
+);
+
+const deskLocation = (
+  <a href="https://maps.cern.ch/?n=[%2752/1-054%27]" target="_blank" rel="noreferrer">
+    <b>52/1-054</b>
+  </a>
+);
+
 export const OpeningHoursDetails = () => {
   return (
     <>
       <Header as="h2">Opening hours</Header>
       <Message info>
         <Message.Content>
-          The CERN community can access the library, located in <b>52/1-052, </b>
+          The CERN community can access the library, located in {libraryLocation},{" "}
           <b>
             <u>24/7</u>
           </b>
           !
           <br />
           Staff is available to help at the Library and Bookshop Welcome Desk, located
-          in
-          <b> 52/1-054</b>, open as per the schedule below :
+          in {deskLocation}, open as per the schedule below :
           <br />
         </Message.Content>
       </Message>