fix

docs/launcher_self_update.md

@@ -50,8 +50,11 @@ certificate would not establish trust on player machines.
 ## Version and AppCast Contract
 
 Increase the `X.Y.Z` version in `pubspec.yaml` for every launcher release. A
-build-number-only change such as `1.0.0+2` is not sufficient because WinSparkle
-compares the Windows product version. Pass the same `X.Y.Z` value to Inno Setup:
+build-number-only change such as `1.0.0+2` is not sufficient for a public
+release. Flutter writes the complete `X.Y.Z+N` value into the Windows
+`ProductVersion`; `sparkle:version` must match that complete value exactly.
+Use `sparkle:shortVersionString` for the human-readable `X.Y.Z` value. Pass
+`X.Y.Z` without the build suffix to Inno Setup:
 
 ```powershell
 ISCC.exe /DMyAppVersion=1.1.0 installer\moonwell_launcher.iss
@@ -75,7 +78,8 @@ Use a public AppCast with absolute URLs:
       <pubDate>Sun, 21 Jun 2026 12:00:00 +0400</pubDate>
       <enclosure
           url="https://storage.yandexcloud.net/warcraft-client/moonwell_launcher_setup.exe"
-          sparkle:version="1.1.0"
+          sparkle:version="1.1.0+3"
+          sparkle:shortVersionString="1.1.0"
           sparkle:os="windows"
           sparkle:dsaSignature="SIGNATURE_FROM_SIGN_UPDATE"
           length="ACTUAL_INSTALLER_SIZE_IN_BYTES"