chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/code-quality.yml

@@ -9,7 +9,7 @@ jobs:
   spotless:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Setup JDK 17
         uses: actions/setup-java@v5
         with:
@@ -25,7 +25,7 @@ jobs:
       security-events: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         # By default, the java version is 11, but we need 17
       - name: Setup JDK 17
         uses: actions/setup-java@v5

.github/workflows/jreleaser.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
       # Setups the environment
       - name: Checkout
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with:
           fetch-depth: 0
       - name: Set up JDK 17

.github/workflows/tests-on-11.yml

@@ -14,7 +14,7 @@ jobs:
         java-version: [ 11 ]
         os: [ ubuntu-latest ]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           submodules: true
       - name: Setup JDK21 for building project

.github/workflows/tests.yml

@@ -13,7 +13,7 @@ jobs:
         java-version: [ 17, 21 ]
         os: [ ubuntu-latest]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           submodules: true
       - name: Setup JDK${{ matrix.java-version }}