chore(deps): bump actions/download-artifact from 4 to 8

cc

.github/workflows/release-snap.yml

@@ -192,7 +192,7 @@ jobs:
       - uses: actions/checkout@v7
 
       - name: Download prebuilt binary
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: qbz-bin-amd64
           path: dl
@@ -249,7 +249,7 @@ jobs:
       - uses: actions/checkout@v7
 
       - name: Download prebuilt binary
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: qbz-bin-arm64
           path: dl