Merge pull request SciML#65 from SciML/dependabot/github_actions/actions/checkout-6

Bump actions/checkout from 4 to 6

Author: ChrisRackauckas

.github/workflows/FormatCheck.yml

@@ -13,7 +13,7 @@ jobs:
   runic:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: fredrikekre/runic-action@v1
         with:
           version: '1'