Bump actions/checkout from 2.4.0 to 3 (#743)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.4.0 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.4.0...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.yml

@@ -57,7 +57,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v2.4.0
+      uses: actions/checkout@v3
 
     - name: Setup Python ${{ matrix.py }}
       uses: actions/setup-python@v3

.github/workflows/lint.yml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
 
       - name: Setup Python 3.10
         uses: actions/setup-python@v3