Bump actions/checkout from 3 to 4 (#25)

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: Emily Rockman <[email protected]>

.github/workflows/build.yml

@@ -38,7 +38,7 @@ jobs:
 
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v5

.github/workflows/ci_code_quality.yml

@@ -38,7 +38,7 @@ jobs:
 
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v5

.github/workflows/ci_tests.yml

@@ -43,7 +43,7 @@ jobs:
 
     steps:
       - name: "Check out the repository"
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: "Set up Python ${{ matrix.python-version }}"
         uses: actions/setup-python@v5