Bump actions/checkout from 3 to 4

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] <support@github.com>

.github/workflows/pypi_install.yml

@@ -16,7 +16,7 @@ jobs:
         with:
           python-version: '3.8'
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install dependencies
         run: pip install wheel
       - name: Build package

.github/workflows/pytest.yml

@@ -29,7 +29,7 @@ jobs:
             test: coveralls
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup python
         uses: actions/setup-python@v4
         with:

.github/workflows/test_install.yml

@@ -27,7 +27,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: pre-install requirements
         run: pip install -r requirements.txt
       - name: Install strax