Update default.html

Author: mwvaughn

_includes/themes/twitter/default.html

@@ -45,8 +45,8 @@
       <footer>
         <p><small>
   <!-- start of footer; modify this part -->
-          <a href="http://sd2e.org/"><img src="https://github.com/SD2E/api-user-guide/assets/sd2e-logo.png" style="width:10%; height:10%"></a> &nbsp;
-          <a href="https://www.tacc.utexas.edu/"><img src="https://github.com/SD2E/api-user-guide/assets/tacc.png" style="width:16%; height:16%"></a> &nbsp;
+          <a href="http://sd2e.org/"><img src="https://sd2e.github.io/api-user-guide/assets/sd2e-logo.png" style="width:10%; height:10%"></a> &nbsp;
+          <a href="https://www.tacc.utexas.edu/"><img src="https://sd2e.github.io/api-user-guide/assets/tacc.png" style="width:16%; height:16%"></a> &nbsp;
 
 <br><br>
 Please e-mail <font face="Courier">wallen-at-tacc-dot-utexas-dot-edu</font> with suggestions or edits