Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/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
...

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

Author: dependabot[bot]

.github/workflows/release-keyring.yaml

@@ -12,7 +12,7 @@ jobs:
         working-directory: src/artifacts-helper/codespaces_artifacts_helper_keyring
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: wntrblm/nox@main
         with:

.github/workflows/release.yaml

@@ -12,7 +12,7 @@ jobs:
       packages: write
       pull-requests: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: "Publish Features"
         uses: devcontainers/action@v1

.github/workflows/test-all.yaml

@@ -23,7 +23,7 @@ jobs:
           - mcr.microsoft.com/devcontainers/base:debian
           - mcr.microsoft.com/cbl-mariner/base/core:2.0
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: "Install latest devcontainer CLI"
         run: npm install -g @devcontainers/cli
@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
     continue-on-error: true
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: "Install latest devcontainer CLI"
         run: npm install -g @devcontainers/cli

.github/workflows/test-keyring.yaml

@@ -24,7 +24,7 @@ jobs:
     outputs:
       session: ${{ steps.set-matrix.outputs.session }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: wntrblm/nox@main
         with:
@@ -43,7 +43,7 @@ jobs:
       matrix:
         session: ${{ fromJson(needs.generate-jobs.outputs.session) }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: wntrblm/nox@main
         with:

.github/workflows/test-pr.yaml

@@ -35,7 +35,7 @@ jobs:
             "mcr.microsoft.com/cbl-mariner/base/core:2.0",
           ]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: "Install latest devcontainer CLI"
         run: npm install -g @devcontainers/cli
@@ -51,7 +51,7 @@ jobs:
       matrix:
         features: ${{ fromJSON(needs.detect-changes.outputs.features) }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: "Install latest devcontainer CLI"
         run: npm install -g @devcontainers/cli