Bump actions/checkout from 5.0.1 to 6.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 5.0.1 to 6.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5.0.1...v6.0.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/publish.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: checkout
-        uses: actions/checkout@v5.0.1
+        uses: actions/checkout@v6.0.0
 
       - name: setup python
         uses: actions/setup-python@v6.0.0

.github/workflows/version.yaml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: checkout
-        uses: actions/checkout@v5.0.1
+        uses: actions/checkout@v6.0.0
         with:
          fetch-depth: 0