Upgrade to actions/checkout v6

Author: carlosame

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
     name: Validate Gradle wrapper
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: gradle/actions/wrapper-validation@v5
 
   build:
@@ -34,7 +34,7 @@ jobs:
 
     steps:
       # Checks-out the repository under $GITHUB_WORKSPACE
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       # Set JDK
       - name: Set up JDK

.github/workflows/codeql-analysis.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v4

.github/workflows/gradle-publish.yml

@@ -16,7 +16,7 @@ jobs:
       packages: write
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up JDK
       uses: actions/setup-java@v5
       with: