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] <support@github.com>

Author: dependabot[bot]

.github/workflows/acceptance.yml

@@ -18,7 +18,7 @@ jobs:
   acceptance:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Use Node.js ${{ env.NODE_VERSION }}
         uses: actions/setup-node@v6

.github/workflows/changelog.yml

@@ -13,7 +13,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # Fetch all history
           fetch-depth: '0'

.github/workflows/code.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Main checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Use Node.js
         uses: actions/setup-node@v6

.github/workflows/i18n.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Main checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Use Node.js
         uses: actions/setup-node@v6

.github/workflows/storybook.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Use Node.js
         uses: actions/setup-node@v6

.github/workflows/unit.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Main checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Use Node.js
         uses: actions/setup-node@v6