Update actions/download-artifct action

Author: netmindz

.github/workflows/wled-ci.yml

@@ -81,7 +81,7 @@ jobs:
     needs: [get_default_envs, build]
     if: startsWith(github.ref, 'refs/tags/')
     steps:
-    - uses: actions/download-artifact@v2
+    - uses: actions/download-artifact@v4
       with:
         name: firmware-release
     - name: Create draft release