⬆ deps: bump actions/download-artifact from 5 to 6

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/coverage.yml

@@ -86,7 +86,7 @@ jobs:
           python-version: '3.9'
 
       - name: Get coverage files
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         id: download
         with:
           pattern: coverage-*

.github/workflows/publish.yml

@@ -59,7 +59,7 @@ jobs:
       id-token: write
     steps:
       - name: Retrieve release distributions
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: release-dists
           path: dist/
@@ -86,7 +86,7 @@ jobs:
 
     steps:
       - name: Retrieve release distributions
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: release-dists
           path: dist/
@@ -117,7 +117,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: Download all the dists
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: release-dists
           path: dist/