Merge pull request #60 from OneSignal/user-api-updates

chore: use upload-artifact@v4 in publish to maven central action

Author: sherwinski

.github/workflows/publish-maven-central.yml

@@ -59,7 +59,7 @@ jobs:
             -Psigning.secretKeyRingFile="${{ secrets.SIGNING_SECRET_KEY_RING_FILE }}"
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
           name: build-artifacts