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

.github/workflows/build_test_analyze.yml

@@ -9,7 +9,7 @@ jobs:
         name: Build
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
               with:
                   fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
             - name: Set up JDK 17

.github/workflows/maven-release-manual.yml

@@ -14,7 +14,7 @@ jobs:
       # We need write permission so we can push the next snapshot version
       contents: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: |
           git config user.name "github-actions[bot]"
           git config user.email "41898282+github-actions[bot]@users.noreply.github.com"

.github/workflows/maven-release.yml

@@ -14,9 +14,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - if: ${{ github.event_name == 'push' }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - if: ${{ inputs.version }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: "${{ inputs.version }}"
       # Alternative command if we just inherit the jdk.version from the parent (grep is faster):

.github/workflows/maven-security.yml

@@ -13,7 +13,7 @@ jobs:
         permissions:
             security-events: write
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
             - name: Set up Maven Central Repository
               uses: actions/setup-java@v5
               with:

.github/workflows/maven-snapshot.yml

@@ -11,7 +11,7 @@ jobs:
             matrix:
                 java: [17]
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
             - name: Set up Maven Central Repository
               uses: actions/setup-java@v5
               with:

.github/workflows/tck.yml

@@ -9,7 +9,7 @@ jobs:
         name: OAI-PMH Validator
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v5
+            -   uses: actions/checkout@v6
                 with:
                     fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
             -   name: Set up JDK 17