Update README.md: python signtool.py

Author: Delphier

README.md

@@ -1,9 +1,13 @@
 # SignTool.exe
-Windows SDK Signing Tools for Desktop Apps - Extract from Windows 11 SDK 10.0.22621.755
+Windows SDK Signing Tools for Desktop Apps: Extract from Windows 11 SDK.
 
-Download from [Releases](../../releases).
+## Download
+Download from [Releases](../../releases) or build latest version:
+```
+python signtool.py
+```
 
 ## How to use
 ```
-signtool.exe sign /f Cert.pfx /p <password> /fd SHA256 /td SHA256 /tr http://timestamp.url.com App.exe
+signtool.exe sign /f Cert.pfx /p <password> /fd SHA256 /td SHA256 /tr http://timestamp.com App.exe
 ```