Bump actions/checkout from 2 to 3 (#97)

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] <support@github.com>

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

.github/workflows/labels.yml

@@ -10,7 +10,7 @@ jobs:
     name: verify
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Verify PR label action
         uses: jesusvasquez333/verify-pr-label-action@v1.4.0
         with:

.github/workflows/release.yml

@@ -28,7 +28,7 @@ jobs:
         --user
         tox
     - name: Check out src from Git
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         fetch-depth: 0  # needed by setuptools-scm
     - name: Build dists

.github/workflows/tox.yml

@@ -72,7 +72,7 @@ jobs:
             tox_env: "packaging"
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@v4
         with: