CLOUD-727: Bump actions/checkout from 5 to 6 (#2122)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Viacheslav Sarzhan <slava.sarzhan@percona.com>

Author: dependabot[bot]

.github/workflows/labeler.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: "Label PR"
         uses: actions/labeler@v6

.github/workflows/reviewdog.yml

@@ -5,7 +5,7 @@ jobs:
     name: runner / suggester / golangci-lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v8
         with:
@@ -17,7 +17,7 @@ jobs:
     name: runner / suggester / gofmt
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: gofmt -w -s $(find . -not -path "*/vendor/*" -name "*.go")
       - uses: reviewdog/action-suggester@v1.24.0
         with:
@@ -27,7 +27,7 @@ jobs:
     name: runner / suggester / goimports-reviser
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v6
         with:
           go-version: '^1.25'
@@ -41,7 +41,7 @@ jobs:
     name: runner / suggester / shfmt
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v6
         with:
           go-version: '^1.25'
@@ -57,7 +57,7 @@ jobs:
     name: runner / shellcheck
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: reviewdog/action-shellcheck@v1
         with:
           github_token: ${{ secrets.github_token }}
@@ -68,7 +68,7 @@ jobs:
     name: runner / misspell
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: reviewdog/action-misspell@v1
         with:
           github_token: ${{ secrets.github_token }}
@@ -80,7 +80,7 @@ jobs:
     name: runner / alex
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: reviewdog/action-alex@v1
         with:
           github_token: ${{ secrets.github_token }}
@@ -92,7 +92,7 @@ jobs:
     name: runner / manifests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: check on release branch
         if: ${{ contains(github.head_ref, 'release-') || contains(github.base_ref, 'release-') }}
         run: |

.github/workflows/scan.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3

.github/workflows/test.yml

@@ -5,7 +5,7 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v6
         with:
           go-version-file: go.mod