[librsvg] Fix link in docs

[Federico Mena Quintero <federico src gnome org>]

commit b7d7d587435e579c15b557d9ce1c6a55d479fdd1
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Nov 13 12:19:12 2019 -0600

    Fix link in docs

 rsvg_internals/src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/rsvg_internals/src/lib.rs b/rsvg_internals/src/lib.rs
index 4e77b4df..579cf935 100644
--- a/rsvg_internals/src/lib.rs
+++ b/rsvg_internals/src/lib.rs
@@ -14,7 +14,7 @@
 //! handle is being drawn or queried for its geometry.  It has all the mutable state related
 //! to the drawing process.
 //!
-//! * [The `Document` struct][document/struct.Document.html] represents a loaded SVG
+//! * [The `Document` struct](document/struct.Document.html) represents a loaded SVG
 //! document.  It holds the tree of [`RsvgNode`] elements, and a mapping of `id` attributes
 //! to the corresponding element nodes.
 //!