Bump actions/checkout from 5 to 6 (#1159)

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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Kurt Garloff <[email protected]>

Author: dependabot[bot]

.github/workflows/build-only.yml

@@ -11,7 +11,7 @@ jobs:
     name: "Build website"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       id: checkout
     # Use GitHub Node Action to install node_modules
     - uses: actions/setup-node@v6

.github/workflows/build-production.yml

@@ -10,7 +10,7 @@ jobs:
     name: "Build and deploy website"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     # Use GitHub Node Action to install node_modules
     - uses: actions/setup-node@v6
       with:

.github/workflows/build-staging.yml

@@ -10,7 +10,7 @@ jobs:
     name: "Build and deploy to GitHub Pages"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       id: checkout
     # Use GitHub Node Action to install node_modules
     - uses: actions/setup-node@v6

.github/workflows/ort-scan.yml

@@ -16,7 +16,7 @@ jobs:
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           distribution: 'zulu' # See 'Supported distributions' for available options