Bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -51,7 +51,7 @@ jobs:
       GROUP_RUNNER: target.'cfg(all())'.runner = 'group-runner'
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
 

.github/workflows/publish.yml

@@ -13,7 +13,7 @@ jobs:
     permissions:
       id-token: write # Required for OIDC token exchange
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: rust-lang/crates-io-auth-action@v1
         id: auth
       - run: cargo publish