Bump actions/checkout from 5.0.0 to 6.0.0 in /.github/workflows

Bumps [actions/checkout](https://github.com/actions/checkout) from 5.0.0 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@08c6903...1af3b93)

---
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] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
     timeout-minutes: 20
     steps:
       - name: Check out Spindle
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
 
       - name: Setup Docker Compose
         uses: docker/setup-compose-action@364cc21a5de5b1ee4a7f5f9d3fa374ce0ccde746
@@ -68,7 +68,7 @@ jobs:
     timeout-minutes: 20
     steps:
       - name: Check out Spindle
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
 
       - name: Setup Docker Compose
         uses: docker/setup-compose-action@364cc21a5de5b1ee4a7f5f9d3fa374ce0ccde746
@@ -112,7 +112,7 @@ jobs:
     timeout-minutes: 20
     steps:
       - name: Check out Spindle
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
 
       - name: Setup Docker Compose
         uses: docker/setup-compose-action@364cc21a5de5b1ee4a7f5f9d3fa374ce0ccde746

.github/workflows/container.yml

@@ -11,7 +11,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435