Bump actions/checkout from 5 to 6 in the major group (#347)

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


Updates `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
  dependency-group: major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/cargo-build.yml

@@ -12,7 +12,7 @@ jobs:
     name: cargo build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install latest rust
         uses: actions-rs/toolchain@v1
         with:

.github/workflows/cargo-clippy.yml

@@ -18,7 +18,7 @@ jobs:
     name: cargo clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install latest rust
         uses: actions-rs/toolchain@v1

.github/workflows/cargo-fmt.yml

@@ -22,7 +22,7 @@ jobs:
     name: cargo fmt
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install latest rust
         uses: actions-rs/toolchain@v1

.github/workflows/cargo-test.yml

@@ -16,7 +16,7 @@ jobs:
     name: cargo test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install latest rust
         uses: actions-rs/toolchain@v1

.github/workflows/docker-image.yml

@@ -23,7 +23,7 @@ jobs:
   docker-image:
     runs-on: ubuntu-latest-8-cores
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Login to GitHub Packages Docker Registry