build(deps): bump actions/checkout from 5 to 6

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>

Author: dependabot[bot]

.github/workflows/_build-rust.yml

@@ -61,7 +61,7 @@ jobs:
     runs-on: ${{ inputs.runs-on }}
     steps:
       - name: Check out
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Rust toolchain
         uses: dtolnay/rust-toolchain@stable
         with:

.github/workflows/integrationtest.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - uses: cachix/install-nix-action@v31
       - name: Set up cargo cache
         uses: actions/cache@v4

.github/workflows/qa.yml

@@ -11,6 +11,6 @@ jobs:
     name: Spellcheck
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       # Executes "typos ."
       - uses: crate-ci/typos@v1.39.0