build(deps): bump actions/checkout from 5 to 6 in /.github/workflows

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] <[email protected]>

Author: dependabot[bot]

.github/workflows/ansible-lint.yml

@@ -11,6 +11,6 @@ jobs:
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
       - uses: DeterminateSystems/magic-nix-cache-action@main
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Run ansible-lint
         run: nix develop --command bash -c "cd ansible && ansible-lint"

.github/workflows/rust.yml

@@ -12,7 +12,7 @@ jobs:
       run:
         working-directory: ci-bench-runner
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install rust toolchain
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -28,7 +28,7 @@ jobs:
         working-directory: ci-bench-runner
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install rust toolchain
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -43,7 +43,7 @@ jobs:
         working-directory: ci-bench-runner
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install rust toolchain
         uses: dtolnay/rust-toolchain@stable
       - name: cargo doc
@@ -58,7 +58,7 @@ jobs:
       run:
         working-directory: ci-bench-runner
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Install stable rust toolchain
       uses: dtolnay/rust-toolchain@stable
     - name: Install valgrind