Bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/dependabot-auto-merge-forward.yml

@@ -26,7 +26,7 @@ jobs:
     steps:
       - name: Checkout
         id: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           token: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}
       - name: Setup GitHub User

.github/workflows/deploy-docs.yml

@@ -17,7 +17,7 @@ jobs:
     if: github.repository_owner == 'spring-projects'
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         ref: docs-build
         fetch-depth: 1

.github/workflows/gradle-wrapper-validation.yml

@@ -6,5 +6,5 @@ jobs:
     name: "Validation"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: gradle/wrapper-validation-action@v3

.github/workflows/merge-dependabot-pr.yml

@@ -12,7 +12,7 @@ jobs:
     if: ${{ github.event.pull_request.user.login == 'dependabot[bot]' && github.repository == 'spring-projects/spring-session' }}
     steps:
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           show-progress: false
           ref: ${{ github.event.pull_request.head.sha }}

.github/workflows/pr-build-workflow.yml

@@ -12,7 +12,7 @@ jobs:
         jdk: [17]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Set up JDK ${{ matrix.jdk }}
         uses: actions/setup-java@v4
         with:

.github/workflows/rebuild-search-index.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: docs-build
           fetch-depth: 1

.github/workflows/release-scheduler.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
       - name: Dispatch

.github/workflows/trigger-dependabot-auto-merge-forward.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - name: Checkout
         id: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - id: trigger
         env:
           GH_TOKEN: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}