updated action version due to deprecation

Author: chenkasirer

.github/workflows/build.yml

@@ -42,7 +42,7 @@ jobs:
           source: examples/ipy
           target: build
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         with:
           name: ipy_ghuser-components
           path: build