build(deps): bump actions/download-artifact from 6 to 7

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

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -245,7 +245,7 @@ jobs:
           ruby-version: ${{ matrix.ruby }}
           apt-get: libsqlite3-dev pkg-config
           mingw: sqlite3
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: source-gem
           path: gems
@@ -319,7 +319,7 @@ jobs:
     runs-on: ${{ matrix.runner || 'ubuntu-latest' }}
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: cruby-${{ matrix.platform }}-gem
           path: gems
@@ -352,7 +352,7 @@ jobs:
       - uses: ruby/setup-ruby@d3e3bd032ad2222a8ac878bbccf2aba78864e134
         with:
           ruby-version: "${{ matrix.ruby }}"
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: cruby-${{ matrix.platform }}-gem
           path: gems
@@ -376,7 +376,7 @@ jobs:
       image: ruby:${{matrix.ruby}}-${{matrix.flavor}}
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: cruby-x86_64-linux-musl-gem
           path: gems