Update disjoint_sets.html

Remove unnecessary dir prefix

doc/disjoint_sets.html

@@ -169,7 +169,7 @@ <h3>Complexity</h3>
   very slowly, much more slowly than the <i>log</i> function.</p>
 
   <h3>See Also</h3><a href=
-  "../doc/incremental_components.html"><tt>incremental_connected_components()</tt></a>
+  "incremental_components.html"><tt>incremental_connected_components()</tt></a>
   <hr>
   <pre>
 disjoint_sets_with_storage&lt;ID,InverseID,FindCompress&gt;
@@ -181,7 +181,7 @@ <h3>See Also</h3><a href=
   The rank and parent properties are initialized during construction so the
   each element is in a set by itself (so it is not necessary to initialize
   objects of this class with the <a href=
-  "../doc/incremental_components.html#sec:initialize-incremental-components">
+  "incremental_components.html#sec:initialize-incremental-components">
   <tt>initialize_incremental_components()</tt></a> function). This class is
   especially useful when computing the (dynamic) connected components of an
   <tt>edge_list</tt> graph which does not provide a place to store vertex