Bump actions/checkout from 5 to 6 (#72)

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

Author: dependabot[bot]

.github/workflows/dependabot.yml

@@ -11,7 +11,7 @@ jobs:
     if: github.event.pull_request.user.login == 'dependabot[bot]' && github.repository == 'HTTPArchive/tech-report-apis'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: |
           cd src
           npm ci

.github/workflows/deployment.yaml

@@ -13,7 +13,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: |
           cd src
           npm ci
@@ -27,7 +27,7 @@ jobs:
       run:
         working-directory: ./terraform/dev
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Google Cloud Auth
         uses: 'google-github-actions/auth@v2'
         with:
@@ -72,7 +72,7 @@ jobs:
       run:
         working-directory: ./terraform/prod
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Google Cloud Auth
         uses: 'google-github-actions/auth@v2'
         with: