ci: change upload artifact to v4

Author: VaalaCat

.github/workflows/master-merge-check.yml

@@ -50,7 +50,7 @@ jobs:
         run: bash ./build.sh
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: build-output
           path: |