ci: bump actions/checkout from 6 to 7 in the actions-core group

Bumps the actions-core group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 6 to 7
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions-core
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci-for-example.yaml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Set up JDK 25
         uses: actions/setup-java@v5
         with:

.github/workflows/ci-from-template.yaml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout PR branch
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           # checkout the pull request head ref when available, otherwise fallback to the workflow ref
           ref: ${{ github.head_ref || github.ref }}

.github/workflows/generate-template.yaml

@@ -14,7 +14,7 @@ jobs:
       GENERATED_BRANCH_NAME: generated-template
     steps:
       - name: Checkout main
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           ref: main
           fetch-depth: 0