Merge pull request #55 from pangeo-data/dependabot/github_actions/actions/checkout-3

Bump actions/checkout from 2.4.0 to 3

Author: Joe Hamman

.github/workflows/main.yaml

@@ -16,7 +16,7 @@ jobs:
       matrix:
         python-version: [3.7, 3.8, 3.9]
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - name: Setup Python
         uses: actions/setup-python@v3
         with:
@@ -49,7 +49,7 @@ jobs:
       matrix:
         python-version: [3.8, 3.9]
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - name: Setup Python
         uses: actions/setup-python@v3
         with: