Fix link

Author: jyn514

src/building/bootstrapping.md

@@ -57,7 +57,7 @@ first build the new compiler with an older compiler and then use that to
 build the new compiler with itself. For development, you usually only want
 the `stage1` compiler: `x.py build library/std`.
 
-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