fix links & twitter handle

Author: berthubert

html/index.html

@@ -58,7 +58,7 @@
     <tr><td>last‑seen‑s</td><td>Time since we've last received from this SV.</td></tr>
   </table>
   <p>
-    The official Galileo constellation status can be found on the <a href="https://www.gsc-europa.eu/system-status/Constellation-Information">European GNSS Service Centre page</a>, which also lists "NAGUs", <a href="https://www.gsc-europa.eu/system-status/user-notifications">notifications about outages or changes</a>.
+    The official Galileo constellation status can be found on the <a href="https://www.gsc-europa.eu/system-service-status/constellation-information">European GNSS Service Centre page</a>, which also lists "NAGUs", <a href="https://www.gsc-europa.eu/system-status/user-notifications">notifications about outages or changes</a>.
   </p>
   <p>
     Official GLONASS status can be found on <a href="https://www.glonass-iac.ru/en/sostavOG/">this page</a> from the Russian Information and Analysis Center for Positioning, Navigation and Timing.
@@ -71,7 +71,7 @@
     Information on the status of BeiDou can be found on <a href="http://www.csno-tarc.cn/system/constellation&amp;ce=english">this page</a> from the Chinese Test and Assessment Research Center of China Satellite Navigation Office.
   </p>
   <p>
-    Feedback is very welcome on [email protected] or <a href="https://twitter.com/PowerDNS_Bert">@PowerDNS_Bert</a>.
+    Feedback is very welcome on [email protected] or <a href="https://twitter.com/bert_hu_bert">@bert_hu_bert</a>.
   </p>
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