Merge pull request #4 from braydonpettit/fix-sidebar

Update _sidebar.md

Author: braydonpettit

docs/_sidebar.md

@@ -1,5 +1,5 @@
 # Resources
 
 - [Learning resources](learning-resources.md)
-- [Documentation references](doc-references__.md)
+- [Documentation references](doc-references.md)
 - [Past work](past-work.md)