build(deps): Bump actions/checkout from 5 to 6 (#2114)

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](https://github.com/actions/checkout/compare/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>

.github/workflows/config-versions-lint.yml

@@ -7,7 +7,7 @@ jobs:
     name: config versions lint
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Setup Go
       uses: actions/setup-go@v6
       with:

.github/workflows/linter.yml

@@ -5,7 +5,7 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v6
         with:
           go-version: '1.25.x'

.github/workflows/misc.yml

@@ -5,7 +5,7 @@ jobs:
     name: miscellaneous checks
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Setup Go
       uses: actions/setup-go@v6
       with:

.github/workflows/proto-lint.yml

@@ -9,7 +9,7 @@ jobs:
     name: proto-checks
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Setup Go
         uses: actions/setup-go@v6

.github/workflows/spell-checker.yml

@@ -5,5 +5,5 @@ jobs:
     name: Spell checker
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: codespell-project/actions-codespell@master

.github/workflows/tests.yml

@@ -69,7 +69,7 @@ jobs:
       shell: bash
 
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Setup Go
       uses: actions/setup-go@v6
@@ -130,7 +130,7 @@ jobs:
         access_token: ${{ github.token }}
 
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Set up Docker buildx
       uses: docker/setup-buildx-action@v3