fix: add checkout step to link checker job

Author: matthamil

.circleci/config.yml

@@ -34,7 +34,7 @@ commands:
     steps:
       - run:
           name: Broken link checker for changed files
-          command: node scripts/changedFilesBrokenLinkChecker.js
+          command: yarn changed-files-broken-link-checker:ci
 
 jobs:
   build:
@@ -56,6 +56,7 @@ jobs:
     executor: node-executor
     working_directory: ~/repo
     steps:
+      - checkout
       - attach_workspace:
           at: ~/repo
       - link-check-changed-files