ci: bump actions/download-artifact (#460)

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


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/download-artifact
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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/publish.yml

@@ -234,13 +234,13 @@ jobs:
         run: uv python install ${{ matrix.python-version }}
 
       - name: Download standard wheel artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: wheels-standard
           path: dist-standard/
 
       - name: Download mypyc wheel artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           pattern: wheels-mypyc-*
           merge-multiple: true
@@ -286,7 +286,7 @@ jobs:
           cache-dependency-glob: uv.lock
 
       - name: Download all artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           pattern: "*"
           merge-multiple: true

.github/workflows/test-build.yml

@@ -292,13 +292,13 @@ jobs:
         run: uv python install ${{ matrix.python-version }}
 
       - name: Download standard wheel artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: wheels-standard
           path: dist-standard/
 
       - name: Download mypyc wheel artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           pattern: wheels-mypyc-*
           merge-multiple: true
@@ -334,7 +334,7 @@ jobs:
           cache-dependency-glob: uv.lock
 
       - name: Download all artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           pattern: "*"
           merge-multiple: true