README: adjust URL to libqgit2 repository

Author: pks-t

README.md

@@ -190,7 +190,7 @@ Language Bindings
 Here are the bindings to libgit2 that are currently available:
 
 * C++
-    * libqgit2, Qt bindings <https://projects.kde.org/projects/playground/libs/libqgit2/>
+    * libqgit2, Qt bindings <https://projects.kde.org/projects/playground/libs/libqgit2/repository/>
 * Chicken Scheme
     * chicken-git <https://wiki.call-cc.org/egg/git>
 * D