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/auto-assign-assignees-as-reviewers.yml

@@ -13,7 +13,7 @@ jobs:
 
         steps:
             - name: Checkout repo
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
 
             - name: Get PR details
               id: pr

.github/workflows/auto-respond-pr.yml

@@ -58,14 +58,14 @@ jobs:
                       }
 
             - name: Checkout base branch
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
               with:
                   ref: ${{ github.event.pull_request.base.ref }}
                   repository: ${{ github.event.pull_request.head.repo.full_name }}
                   path: base
 
             - name: Checkout PR branch
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
               with:
                   ref: ${{ github.event.pull_request.head.ref }}
                   repository: ${{ github.event.pull_request.head.repo.full_name }}

.github/workflows/check-android-content-scope-experiments.yml

@@ -17,7 +17,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout code
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
             - name: Use Node.js 20
               uses: actions/setup-node@v5
               with:

.github/workflows/msp-filter-stale.yml

@@ -9,7 +9,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout repository
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
               with:
                   repository: duckduckgo/privacy-configuration
                   path: privacy-configuration/

.github/workflows/publish-test-url.yml

@@ -11,7 +11,7 @@ jobs:
             cancel-in-progress: false
         steps:
             - name: Checkout the repository
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
             - name: Use Node.js 20
               uses: actions/setup-node@v5
               with:
@@ -23,7 +23,7 @@ jobs:
               run: npm run build
 
             - name: Checkout preview-pages branch
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
               with:
                   ref: preview-pages
                   path: pages-branch

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ jobs:
     unit:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
             - name: Use Node.js 20
               uses: actions/setup-node@v5
               with:
@@ -22,7 +22,7 @@ jobs:
     lint:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
             - name: Use Node.js 20
               uses: actions/setup-node@v5
               with: