config.yml in percy-capybara-4.1.0

- old
+ new

@@ -4,12 +4,12 @@
   steps:
     - checkout
     - run: gem update --system
     # We need this specific version of bundler for our Gemfile. (v2 doesn't work)
     - run: gem install bundler --version '1.7'
-    - run: npm install
+    - run: yarn
     - run: bundle install
-    - run: npx percy exec -- bundle exec rspec
+    - run: yarn percy exec -- bundle exec rspec
     - run: bundle exec rubocop -D
 
 jobs:
   ruby_latest_with_percy:
     # This is the one environment where we'll capture and upload snapshots in CI.