Update README.md

Author: stesee

README.md

@@ -29,5 +29,5 @@ await chromiumRenderer.ConvertHtmlToPng(actualFilePath, pathRasterizedHtml);
 sudo apt install libgbm-dev libatk-bridge2.0-0
 curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
 exit
-nvm install 16
+nvm install 18
 ```