Bump actions/checkout from 3 to 4 (#220)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
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>
Co-authored-by: Bradley A. Thornton <[email protected]>

.github/workflows/release.yml

@@ -29,7 +29,7 @@ jobs:
         run: python3 -m pip install --user "tox>=4.0.0"
 
       - name: Check out src from Git
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0 # needed by setuptools-scm
           submodules: true

.github/workflows/run.yml

@@ -12,7 +12,7 @@ jobs:
   tox-matrix:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.5.0
+      - uses: actions/checkout@v4
         with:
           ref: ${{github.event.pull_request.head.ref}}
           repository: ${{ github.event.pull_request.head.repo.full_name }}
@@ -42,7 +42,7 @@ jobs:
     name: ${{ matrix.entry.name }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.5.0
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0

.github/workflows/tox.yml

@@ -40,7 +40,7 @@ jobs:
       matrix: ${{ fromJson(needs.pre.outputs.matrix) }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0 # needed by setuptools-scm