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

Author: renovate[bot]

.github/workflows/docs-pages.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.repository.default_branch }}
           persist-credentials: false

.github/workflows/docs-pr.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
           fetch-depth: 0

.github/workflows/integration-tests.yml

@@ -52,7 +52,7 @@ jobs:
             event_loop_manager: "asyncore"
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up JDK ${{ matrix.java-version }}
       uses: actions/setup-java@v5

.github/workflows/lib-build-and-push.yml

@@ -83,11 +83,11 @@ jobs:
         include: ${{ fromJson(needs.prepare-matrix.outputs.matrix) }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Checkout tag ${{ inputs.target_tag }}
         if: inputs.target_tag != ''
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ inputs.target_tag }}
 
@@ -162,7 +162,7 @@ jobs:
     name: Build source distribution
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install uv
         uses: astral-sh/setup-uv@v7