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/ci-sonar.yml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Sonar cần có full history để tính "blame"
 

.github/workflows/coding-service-publish.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: docker/setup-qemu-action@v3
       - uses: docker/setup-buildx-action@v3
 

.github/workflows/deploy.yml

@@ -43,7 +43,7 @@ jobs:
           echo "run.head_sha:      ${{ github.event.workflow_run.head_sha }}"
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Derive IMAGE_TAG (from workflow_run or manual)
         shell: bash

.github/workflows/docker-publish.yml

@@ -37,7 +37,7 @@ jobs:
           - org-service
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: docker/setup-qemu-action@v3
       - uses: docker/setup-buildx-action@v3
 

.github/workflows/file-service-publish.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: docker/setup-qemu-action@v3
       - uses: docker/setup-buildx-action@v3
 

.github/workflows/sandbox-image-build-on-server.yml

@@ -16,7 +16,7 @@ jobs:
   build-on-server:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Prepare bundle
         run: |