CONTRIBUTING.md in bib-vagrant-0.1.2 vs CONTRIBUTING.md in bib-vagrant-0.1.3

@@ -6,7 +6,7 @@
  4. Push to the branch (`git push origin my-new-feature`)
  5. Create new Pull Request
 
 # publishing new release
 
-Use `rake release` to tag & publish a new release
+Use `bundle exec rake release` to tag & publish a new release