Merge pull request #19 from climate-service-center/dependabot/github_…

…actions/actions/checkout-4

Bump actions/checkout from 3 to 4

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
         # Bookend python versions
         python-version: ["3.8", "3.9", "3.10"]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0 # Fetch all history for all branches and tags.
       - name: Set environment variables