Fix GitHub actions build

Author: Parik27

.github/workflows/main.yml

@@ -29,7 +29,7 @@ jobs:
         cp ../config.toml output/rainbomizer/
         
     - name: Upload
-      uses: actions/upload-artifact@v1
+      uses: actions/upload-artifact@v4
       with:
         name: "V.Rainbomizer"
         path: bin/output