Bump actions/checkout from 4.2.0 to 4.2.1 (#478)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.2.0 to 4.2.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4.2.0...v4.2.1)

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

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

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
         RUST:
           - nightly
     steps:
-      - uses: actions/checkout@v4.2.0
+      - uses: actions/checkout@v4.2.1
         with:
           persist-credentials: false
 
@@ -68,7 +68,7 @@ jobs:
             FLAGS: "-Z minimal-versions"
 
     steps:
-      - uses: actions/checkout@v4.2.0
+      - uses: actions/checkout@v4.2.1
         with:
           persist-credentials: false
 
@@ -93,7 +93,7 @@ jobs:
   coverage:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4.2.0
+      - uses: actions/checkout@v4.2.1
         with:
           persist-credentials: false