Bump actions/checkout from 5 to 6 (#13)

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

Author: dependabot[bot]

.github/workflows/deploy-artifacts.yml

@@ -46,7 +46,7 @@ jobs:
           echo "ARTIFACT_PATH=${PAYLOAD_NAME}-${PAYLOAD_VERSION}.tar.gz" >> $GITHUB_ENV
 
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: main
           fetch-depth: 0

.github/workflows/update-mapping.yml

@@ -22,7 +22,7 @@ jobs:
         run: |
           sudo apt-get install libxml2-utils
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Configure Git author
         run: |