chore(build): Update app version suffixes from alpha to beta

Author: Jankin-Wu

composeApp/build.gradle.kts

@@ -6,7 +6,7 @@ val osName = System.getProperty("os.name").lowercase()
 val osArch = System.getProperty("os.arch").lowercase()
 
 val appVersion = "1.1.6"
-val appVersionSuffix = "Alpha"
+val appVersionSuffix = "Beta"
 
 val platformStr = when {
     osName.contains("win") -> {