Merge pull request #6 from JuliaMath/dependabot/github_actions/actions/checkout-3

Bump actions/checkout from 2 to 3

Author: stevengj

.github/workflows/CI.yml

@@ -23,7 +23,7 @@ jobs:
         arch:
           - x64
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}