Merge pull request #155 from SciML/dependabot/github_actions/actions/checkout-4

Bump actions/checkout from 3 to 4

Author: ChrisRackauckas

.github/workflows/cff-validator.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Validate CITATION.cff
         uses: dieghernan/cff-validator@v3