ci(deps): bump actions/checkout from 4 to 6 (#300)

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](actions/checkout@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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/integration-examples.yml

@@ -103,7 +103,7 @@ jobs:
 
     steps:
       - name: Checkout rules_wasm_component (this PR)
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           path: rules_wasm_component
 
@@ -140,7 +140,7 @@ jobs:
           echo "══════════════════════════════════════════════════════════"
 
       - name: Checkout examples repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: pulseengine/wasm-component-examples
           ref: ${{ steps.examples-branch.outputs.branch }}