chore(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 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/v4...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>

.github/workflows/clippy-check-example.yml

@@ -29,7 +29,7 @@ jobs:
     name: Validate platform ${{ inputs.platform }}, backend ${{ inputs.backend }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Configure Rust target ${{ inputs.rustup-target }}
         run: rustup target add ${{ inputs.rustup-target }}
@@ -44,7 +44,7 @@ jobs:
     name: Check examples
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Configure Rust target ${{ inputs.rustup-target }}
         run: rustup target add ${{ inputs.rustup-target }}
@@ -60,7 +60,7 @@ jobs:
     name: Run clippy
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Configure Rust target ${{ inputs.rustup-target }}
       run:  rustup target add ${{ inputs.rustup-target }}