Fix broken Sikt URLs

Of course, these URLs seem to have moved around somewhat in Sikt's infancy.

NOTES.rst

@@ -182,7 +182,7 @@ just doing everything under a new name.
 In the coming year, references to Uninett, both in the NAV documentation, code
 and related web sites will slowly change into Sikt, but for some time going
 forward, there will be references to both names.  For more information about
-the new organization, we refer you to https://sikt.no/about-sikt
+the new organization, we refer you to https://sikt.no/en/about-sikt
 
 
 Dependency changes

python/nav/web/templates/footer.html

@@ -20,7 +20,7 @@
            src="{{ STATIC_URL }}images/main/sikt-logo-grey.svg" alt="Sikt - Norwegian Agency for Shared Services in Research and Education">
 
       <p>
-        <a href="https://sikt.no/about-sikt">Sikt</a> develops and delivers services for education and research that
+        <a href="https://sikt.no/en/about-sikt">Sikt</a> develops and delivers services for education and research that
         makes life easier for students and employees. Sikt aims to ensure that everyone working in the education
         and research sector has access to secure, stable and comprehensive services.
       </p>

python/nav/web/templates/webfront/about.html

@@ -6,7 +6,7 @@ <h2>About NAV</h2>
 <h3>What is NAV?</h3>
 
 <div style="float: right;">
-        <a href="http://sikt.no/about-sikt"><img
+        <a href="http://sikt.no/en/about-sikt"><img
         src="{{ STATIC_URL }}images/about/sikt.png" width="157" height="43" alt="Sikt"
         style="margin: 22px; margin-top: 0;"/></a><br />
         <a href="http://www.ntnu.no/"><img src="{{ STATIC_URL }}images/about/ntnu.jpg"