Downgrade actions/upload-artifact to v4

Author: Aursen

.github/workflows/node-build.yml

@@ -127,7 +127,7 @@ jobs:
         run: ${{ matrix.settings.build }}
         shell: bash
       - name: Upload artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v4
         with:
           name: bindings-${{ matrix.settings.target }}
           path: crates/node-litesvm/litesvm/litesvm.*.node