build(deps): bump actions/download-artifact in the actions group

Bumps the actions group with 1 update: [actions/download-artifact](https://github.com/actions/download-artifact).


Updates `actions/download-artifact` from 7.0.0 to 8.0.0
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@37930b1...70fc10c)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: 8.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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

Author: dependabot[bot]

.github/workflows/CI.yml

@@ -125,7 +125,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7.0.0
+      - uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
         with:
           name: rfc3161-sdist
 
@@ -228,7 +228,7 @@ jobs:
       # Used to publish to PyPI with Trusted Publishing.
       id-token: write
     steps:
-      - uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7.0.0
+      - uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
         with:
           path: dist/
           merge-multiple: true