Update some link rot

index.html

@@ -44,7 +44,7 @@
 
 <p><a href="{{ site.splinesoft.github }}/SSDataSources">SSDataSources</a> &mdash; Flexible data sources for your <code>UITableView</code> and <code>UICollectionView</code>.</p>
 
-<p>Force.com &mdash; the <a href="https://appexchange.salesforce.com/listingDetail?listingId=a0N30000003GL36EAG">Chatter Combo Pack</a>, <a href="https://sites.secure.force.com/appexchange/listingDetail?listingId=a0N30000003I9j1EAC">LinkForce - A URL Shortener</a>, <a href="https://github.com/jhersh/GroupMaster">GroupMaster</a>, <a href="https://sites.secure.force.com/appexchange/listingDetail?listingId=a0N30000003IKtREAW">Chatter Invites</a>, and the <a href="https://github.com/jhersh/Chatter-Data-Loader">Chatter Data Loader</a>.
+<p>Force.com &mdash; the <a href="https://appexchange.salesforce.com/listingDetail?listingId=a0N30000003GL36EAG">Chatter Combo Pack</a>, <a href="https://github.com/jhersh/LinkForce">LinkForce - A URL Shortener</a>, <a href="https://github.com/jhersh/GroupMaster">GroupMaster</a>, Chatter Invites, and the <a href="https://github.com/jhersh/Chatter-Data-Loader">Chatter Data Loader</a>.
 
 <p><a href="{{ site.sandbox.url }}/calculator.php">Carnegie Mellon QPA Calculator</a> &mdash; Carnegie Mellon's QPA is a bizarro GPA from an alternate timeline. This calculator can help.