Update contributing.md to reference latest gemspec file.

gobijan · zorab47 · commit 5bd66a343a29 · 2018-04-13T08:49:54.000-05:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -29,7 +29,7 @@ least version `1.14.3`.
 Select the Gemfile for your preferred Rails version, preferably the latest:
 
 ```sh
-export BUNDLE_GEMFILE=gemfiles/rails_51.gemfile
+export BUNDLE_GEMFILE=gemfiles/rails_52.gemfile
 ```
 
 Now install the development dependencies:
