Update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/codeql.yml

@@ -42,7 +42,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Set up JDK 20
       uses: actions/setup-java@v3

.github/workflows/docker-image.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build the Docker image
       run: make compose/rebuild
     - name: Run test in Docker image

.github/workflows/gradle.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK 20
         uses: actions/setup-java@v3
         with:

.github/workflows/markdown-lint.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Set up Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v3

.github/workflows/sonarcloud.yml

@@ -13,7 +13,7 @@ jobs:
     name: Build and analyze
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
       - name: Set up JDK 20