Fix broken link in Readme (#935)

* Update README.md

* Update README.md

* Update README.md

README.md

@@ -32,7 +32,7 @@ provides a set of functions to find images generated by `flutter_svg` in widget
 - SMIL animations. That just seems crazy. I think it'll be possible to animate
   the SVG but probably in a more Flutter driven way.
 - Interactivity/events in SVG.
-- Any CSS support - preprocess your SVGs (perhaps with [usvg](https://github.com/RazrFalcon/resvg/tree/master/usvg) or [scour](https://github.com/scour-project/scour) to get rid of all CSS?).
+- Any CSS support - preprocess your SVGs (perhaps with [usvg](https://github.com/RazrFalcon/resvg/tree/master/crates/usvg) or [scour](https://github.com/scour-project/scour) to get rid of all CSS?).
 - Scripting in SVGs
 - Foreign elements
 - Rendering properties/hints