Merge pull request #568 from typelevel/dependabot/github_actions/actions/checkout-6.0.0

Author: rossabaker

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5.0.0
+      - uses: actions/checkout@v6.0.0
 
       - name: "Install Nix️"
         uses: samueldr/lix-gha-installer-action@v1