Bump the major-updates group with 3 updates

Bumps the major-updates group with 3 updates: [actions/checkout](https://github.com/actions/checkout), [actions/upload-artifact](https://github.com/actions/upload-artifact) and [actions/download-artifact](https://github.com/actions/download-artifact).


Updates `actions/checkout` from 6 to 7.0.0
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

Updates `actions/upload-artifact` from 6 to 7
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

Updates `actions/download-artifact` from 7 to 8
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v7...v8)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major-updates
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major-updates
- dependency-name: actions/download-artifact
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major-updates
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/dzil-build-and-test.yml

@@ -21,15 +21,15 @@ jobs:
     container:
       image: perldocker/perl-tester:5.42
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Run Tests
         env:
           AUTHOR_TESTING: 1
           AUTOMATED_TESTING: 1
           EXTENDED_TESTING: 1
           RELEASE_TESTING: 1
         run: upgrade-perl-helpers && auto-build-and-test-dist
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: build_dir
           path: build_dir
@@ -39,8 +39,8 @@ jobs:
     container:
       image: perldocker/perl-tester:5.42
     steps:
-      - uses: actions/checkout@v6 # codecov wants to be inside a Git repository
-      - uses: actions/download-artifact@v7
+      - uses: actions/checkout@v7 # codecov wants to be inside a Git repository
+      - uses: actions/download-artifact@v8
         with:
           name: build_dir
           path: .
@@ -105,7 +105,7 @@ jobs:
         with:
           perl-version: ${{ matrix.perl-version }}
         if: ${{ matrix.os != 'windows-latest' }}
-      - uses: actions/download-artifact@v7
+      - uses: actions/download-artifact@v8
         with:
           name: build_dir
           path: .