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] <[email protected]>

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
     steps:
 
       - name: Checkout Code Repository
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v4
 
       - name: Set up Python 3.9
         uses: actions/setup-python@v4
@@ -67,7 +67,7 @@ jobs:
     steps:
 
       - name: Checkout Code Repository
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v4
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
@@ -101,7 +101,7 @@ jobs:
 
     steps:
       - name: Checkout Code Repository
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v4
 
       - name: Set up Python 3.8
         uses: actions/setup-python@v4
@@ -137,7 +137,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4

.github/workflows/combine-prs.yml

@@ -95,7 +95,7 @@ jobs:
             console.log('Combined: ' + combined);
             return combined
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v4.1.1
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       # Creates a branch with other PR branches merged together

.github/workflows/gitleaks.yml

@@ -10,7 +10,7 @@ jobs:
     name: gitleaks
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: gitleaks/gitleaks-action@v2