ci: update actions/checkout from v2 to v3 in example (#31)

Author: mcanouil

examples/quarto-publish-example.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v2 
+        uses: actions/checkout@v3
 
       - name: Set up Quarto
         uses: quarto-dev/quarto-actions/setup@v2
@@ -43,4 +43,4 @@ jobs:
       #     target: gh-pages
       #   env:
       #     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # this secret is always available for github actions
-      
+