Update UPGRADING.md

UPGRADING.md

@@ -110,7 +110,7 @@
 * Added `AppCastReducers` helpers for common ways of filtering app cast items (@kenjiuno)
 * Added `SparkleUpdater.InstallUpdateFailed` to see why `InstallUpdate` or its related installer methods fail. Also adds `Enums.InstallUpdateFailureReason`. (fe546de8667b1a5d6e0c4a72a7c128dc954f4aba)
 * `WebFileDownloader.PrepareToDownloadFile` is now `virtual` (84df81122cfae9309de4f5b79489e46287bf3a62)
-* The app cast maker now expects at least `Major.Minor` for version numbers and no longer accepts single digits as version numbers (this fixes things like "My Super App Version 2.exe" having 2 being detected as the version number when the version number is in a prior folder name, and also ensures that the right number is being read)
+* The app cast maker now expects at least `Major.Minor` for version numbers and no longer accepts single digits as version numbers (this fixes things like "My Super App Version 2.exe" having 2 being detected as the version number when the version number is in a prior folder name, and also ensures that the right number is being read). Note that if you want to use semantic versions with file name version detection, you need to use `Major.Minor.Revision`. `1.0-beta1` will not be parsed as a semantic version and will in fact not be detected as having a version at all.
 * If `JSONConfiguration` cannot save data, `SparkleUpdater` now uses the `DefaultConfiguration` class, which basically has no information set on it and will always check for updates for the user. (a33266ac99b3eed83ff481ee7ef06cc5a0b1ab40)
 * Fixed Avalonia message window close button not working properly (394841d47c8b6739ca0ebcec87303529b81da904)
 * Fixed `AssemblyReflectionEditor` not loading in a way that allowed for proper file closing of the DLL (fixes a unit testing issue)