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/checks.yml

@@ -16,7 +16,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout code
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
 
             - name: Install node
               uses: actions/setup-node@v6
@@ -42,7 +42,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout code
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
 
             - name: Install node
               uses: actions/setup-node@v6

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout code
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
 
             - name: Install node
               uses: actions/setup-node@v6
@@ -43,7 +43,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout code
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
 
             - name: Install node
               uses: actions/setup-node@v6
@@ -93,7 +93,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout code
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
 
             - name: Download production artifacts for publication
               uses: actions/download-artifact@v5