Bump actions/checkout from 2 to 3 (#7)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v3)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -15,7 +15,7 @@ jobs:
         uses: styfle/[email protected]
         with:
           access_token: ${{ github.token }}
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - uses: conda-incubator/setup-miniconda@master
         with:

.github/workflows/preview.yaml

@@ -14,7 +14,7 @@ jobs:
       run:
         shell: bash
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Set message value
         run: |
           echo "comment_message=This pull request is being automatically built with [GitHub Actions](https://github.com/features/actions) and [Netlify](https://www.netlify.com/). To see the status of your deployment, click below." >> $GITHUB_ENV