Update actions/download-artifact action to v6

Author: renovate[bot]

.github/workflows/report-fuzz-crash.yml

@@ -39,7 +39,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Download fuzzer logs
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ${{ inputs.logs_artifact_name }}
           path: ./logs