Merge pull request #17 from heroku/dependabot/github_actions/actions/checkout-6

Bump actions/checkout from 4 to 6

Author: wchrisjohnson

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.7
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: install dependencies