Fix link

Author: jyn514

src/building/bootstrapping.md

@@ -71,7 +71,7 @@ These defaults are as follows:
 
 You can always override the stage by passing `--stage N` explicitly.
 
-For more information about stages, see <#understanding-stages-of-bootstrap> below.
+For more information about stages, [see below](#understanding-stages-of-bootstrap).
 
 ## Complications of bootstrapping