chore(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  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

@@ -32,7 +32,7 @@ jobs:
             volumes: "rw"
     steps:
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           path: "lablabs.rke2"
 
@@ -67,7 +67,7 @@ jobs:
             volumes: "rw"
     steps:
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           path: "lablabs.rke2"
 
@@ -104,7 +104,7 @@ jobs:
   #           volumes: "rw"
   #   steps:
   #     - name: checkout
-  #       uses: actions/checkout@v4
+  #       uses: actions/checkout@v6
   #       with:
   #         path: 'lablabs.rke2'
 
@@ -142,7 +142,7 @@ jobs:
   #           volumes: "rw"
   #   steps:
   #     - name: checkout
-  #       uses: actions/checkout@v4
+  #       uses: actions/checkout@v6
   #       with:
   #         path: 'lablabs.rke2'
 

.github/workflows/lint.yml

@@ -12,7 +12,7 @@ jobs:
       fail-fast: true
     steps:
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           path: 'lablabs.rke2'
 

.github/workflows/pre-commit.yml

@@ -9,7 +9,7 @@ jobs:
   pre-commit:
     runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v5
 
     - name: Run pre-commit