Bump actions/checkout from 1 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 1 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v1...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/CI.yml

@@ -43,7 +43,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v1
+      uses: actions/checkout@v4
 
     - name: Install GFortran macOS
       if: contains(matrix.os, 'macos')
@@ -194,7 +194,7 @@ jobs:
       - build
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Download Artifacts
       uses: actions/download-artifact@v2
@@ -277,7 +277,7 @@ jobs:
       env:
         DEPLOY_BRANCH: ${{ secrets.DEPLOY_BRANCH && contains(github.ref, secrets.DEPLOY_BRANCH) && 1 || 0 }}
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       if: ${{ github.event_name == 'push' }}
 
     - name: Download Artifacts

.github/workflows/docs.yml

@@ -6,7 +6,7 @@ jobs:
   build-and-deploy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v1
       with:
         python-version: '3.x'

.github/workflows/meta.yml

@@ -43,7 +43,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v1
+      uses: actions/checkout@v4
 
     - name: (Ubuntu) setup gcc version
       if: contains(matrix.os,'ubuntu')

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
       FORMAT: ${{ matrix.format }}
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
@@ -124,7 +124,7 @@ jobs:
       env:
         DEPLOY_BRANCH: ${{ secrets.DEPLOY_BRANCH && contains(github.ref, secrets.DEPLOY_BRANCH) && 1 || 0 }}
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       if: ${{ github.event_name == 'push' }}
 
     - name: Download Artifacts