Merge pull request #78 from JuliaLinearAlgebra/dependabot/github_actions/actions/checkout-3

Bump actions/checkout from 2 to 3

Author: chriselrod

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
           - '3'
         os: [ubuntu-latest, windows-latest, macOS-latest]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.julia-version }}