Update main.yml

Author: emd4600

.github/workflows/main.yml

@@ -29,7 +29,7 @@ jobs:
           msbuild "Spore ModAPI" -t:BuildCombinedDll -p:BuildVer=$count -p:Config=Release
 
       - name: Upload compiled files
-        uses: actions/upload-artifact@v3.1.3
+        uses: actions/upload-artifact@v4
         with:
           name: compiled-modapi-dlls
           path: |