Merge pull request #133 from kolkhis/index-reorganization

style: Reorder organization

Author: kolkhis

src/SUMMARY.md

@@ -35,8 +35,9 @@
 - [Unit 10](./u10intro.md)
   - [Work Sheet](./u10ws.md)
   - [Lab](./u10lab.md)
+- [Outro](./outro.md)
+- [Contributors](./contributors.md)
 - [Contributing](./contributing.md)
   - [Local Testing](./development.md)
-- [Contributors](./contributors.md)
 - [Resources](./resources.md)
-- [Outro](./outro.md)
+- [Downloads](./downloads.md)