Merge pull request #88 from JuliaStats/dependabot/github_actions/actions/checkout-4

Bump actions/checkout from 2 to 4

Author: tpapp

.github/workflows/CI.yml

@@ -45,7 +45,7 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
         with:
           version: '1'