Bump actions/checkout from 3 to 4 (#1237)

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](https://github.com/actions/checkout/compare/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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yaml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Check out code from Github
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Set up Python ${{ env.DEFAULT_PYTHON }}
       id: python
@@ -83,7 +83,7 @@ jobs:
             plex: claimed
     steps:
     - name: Check out code from Github
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Set up Python ${{ env.DEFAULT_PYTHON }}
       id: python
@@ -208,7 +208,7 @@ jobs:
             plex: claimed
     steps:
     - name: Check out code from GitHub
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Set up Python ${{ env.DEFAULT_PYTHON }}
       id: python

.github/workflows/codeql.yml

@@ -46,7 +46,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/pypi.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Set up Python
       uses: actions/setup-python@v4