Bump actions/download-artifact from 6 to 7 (#1006)

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -266,35 +266,35 @@ jobs:
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: ubuntu-latest-3.10
           path: /tmp/u310
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: ubuntu-latest-3.11
           path: /tmp/u311
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: ubuntu-latest-3.12
           path: /tmp/u312
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: ubuntu-latest-3.13
           path: /tmp/u313
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: macos-latest-3.10
           path: /tmp/m310
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: macos-latest-3.13
           path: /tmp/m313
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: windows-latest-3.10
           path: /tmp/w310
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: windows-latest-3.13
           path: /tmp/w313