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-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ets-from-source.yml

@@ -26,7 +26,7 @@ jobs:
       # relative path between the site-packages and the source directory.
       EDM_ROOT_DIRECTORY: ${{ github.workspace }}/.edm
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Qt dependencies
         uses: ./.github/actions/install-qt-support
         if: matrix.toolkit != 'wx'

.github/workflows/publish-on-pypi.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
     - name: Check out the release commit
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Set up Python
       uses: actions/setup-python@v4
       with:

.github/workflows/run-style-checks.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with:

.github/workflows/run-tests.yml

@@ -28,7 +28,7 @@ jobs:
 
     steps:
     - name: Check out the target commit
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Install Qt dependencies
       uses: ./.github/actions/install-qt-support
     - name: Set up Python ${{ matrix.python-version }}
@@ -63,7 +63,7 @@ jobs:
 
     steps:
     - name: Check out the target commit
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with:

.github/workflows/test-docs-with-edm.yml

@@ -28,7 +28,7 @@ jobs:
       # relative path between the site-packages and the source directory.
       EDM_ROOT_DIRECTORY: ${{ github.workspace }}/.edm
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Qt dependencies
         uses: ./.github/actions/install-qt-support
         if: matrix.toolkit != 'wx'

.github/workflows/test-with-edm.yml

@@ -29,7 +29,7 @@ jobs:
       # relative path between the site-packages and the source directory.
       EDM_ROOT_DIRECTORY: ${{ github.workspace }}/.edm
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Qt dependencies
         uses: ./.github/actions/install-qt-support
         if: matrix.toolkit != 'wx'