Bump actions/upload-artifact from 5 to 6 (#116)

Author: zefir-git

.github/workflows/ci.yml

@@ -36,7 +36,7 @@ jobs:
         run: npm pack
 
       - name: Upload package artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: package
           path: cldn-ip-0.0.0-dev.tgz