Bump actions/checkout from 5.0.0 to 6.0.2

Bumps [actions/checkout](https://github.com/actions/checkout) from 5.0.0 to 6.0.2.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@08c6903...de0fac2)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/elixir_tests.yml

@@ -15,7 +15,7 @@ jobs:
           apt-get update
           apt-get install -y git
 
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
         with:
           submodules: recursive
 
@@ -52,7 +52,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
       - name: Run Smoke Test in Docker
         run: bin/run-tests-in-docker.sh

.github/workflows/exercism_test_helper_build_test.yml

@@ -14,7 +14,7 @@ jobs:
       image: hexpm/elixir:1.19.4-erlang-28.1-debian-bookworm-20251117
 
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
       - name: Install Dependencies
         run: |
           cd exercism_test_helper