chore(deps): bump actions/checkout from 4.1.7 to 4.2.1

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.7 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@v4.1.7...v4.2.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci.yaml

@@ -16,7 +16,7 @@ jobs:
       matrix:
         k8s_version: [v1.29.0]
     steps:
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@v4.2.1
 
       - uses: engineerd/[email protected]
         id: kind

.github/workflows/elixir_matrix.yaml

@@ -23,7 +23,7 @@ jobs:
             otp: "23.x"
 
     steps:
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@v4.2.1
       - uses: erlef/setup-beam@v1
         with:
           otp-version: ${{matrix.otp}}

.github/workflows/k8s_matrix.yaml

@@ -20,7 +20,7 @@ jobs:
         with:
           version: v0.18.0
           image: kindest/node:${{ matrix.k8s_version }}
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@v4.2.1
       - uses: erlef/setup-beam@v1
         with:
           version-file: .tool-versions