Bump actions/checkout from 5 to 6 in the major group (#276)

Bumps the major group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: namespace-profile-ubuntu-2-cores
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v6
         with:
@@ -39,7 +39,7 @@ jobs:
     if: false
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v6
         with:
@@ -60,7 +60,7 @@ jobs:
     if: false
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v6
         with:

.github/workflows/update-dev-branch.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: namespace-profile-ubuntu-2-cores
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - shell: bash
         run: |
           # checkout our branch