Merge pull request #102 from cisagov/dependabot/github_actions/actions/checkout-3

Bump actions/checkout from 2 to 3

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
     steps:
       - id: setup-env
         uses: cisagov/setup-env-github-action@develop
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - id: setup-python
         uses: actions/setup-python@v3
         with: