chore(deps): bump actions/download-artifact from 5 to 7

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 5 to 7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...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] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -128,7 +128,7 @@ jobs:
           cache-read-only: ${{ github.ref != 'refs/heads/trunk' }}
 
       - name: Download dtest jars
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v7
         with:
           name: dtest-jars
           path: dtest-jars/
@@ -217,7 +217,7 @@ jobs:
           done
 
       - name: Download dtest jars
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v7
         with:
           name: dtest-jars
           path: dtest-jars/
@@ -308,13 +308,13 @@ jobs:
           cat /etc/hosts
 
       - name: Download dtest jars
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v7
         with:
           name: dtest-jars
           path: dtest-jars/
 
       - name: Download cassandra tarballs
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v7
         with:
           name: cassandra-tarballs
           path: cassandra-tarballs/