readme: add tips for Windows users

Author: love-linger

README.md

@@ -37,6 +37,7 @@ You can download the latest stable from [Releases](https://github.com/sourcegit-
 For **Windows** users:
 
 * **MSYS Git is NOT supported**. Please use official [Git for Windows](https://git-scm.com/download/win) instead.
+* `Source.win-x64.zip` may be reported as virus by Windows Defender. I don't know why. I have manually tested the zip to be uploaded using Windows Defender before uploading and no virus was found. If you have installed .NET 8 SDK locally, I suggest you to compile it yourself. And if you have any idea about how to fix this, please open an issue.
 
 For **macOS** users: