Bump actions/checkout from 3 to 4 (#294)

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>

.github/workflows/CI.yml

@@ -16,7 +16,7 @@ jobs:
     steps:
       - name: Checkout
         if: ${{ github.ref == 'refs/heads/master' || github.base_ref == 'master' }}
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Verify Changelog
         id: verify_changelog
@@ -38,7 +38,7 @@ jobs:
     steps:
       - name: Checkout
         if: ${{ github.ref == 'refs/heads/master' || github.base_ref == 'master' }}
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Python
         if: ${{ github.ref == 'refs/heads/master' || github.base_ref == 'master' }}
@@ -80,7 +80,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Python 3.9
         uses: actions/setup-python@v4

.github/workflows/localize.yml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Python 3.9
         uses: actions/setup-python@v4  # https://github.com/actions/setup-python

.github/workflows/python-tests.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python 3.9
         uses: actions/setup-python@v4  # https://github.com/actions/setup-python