Separate metadata by a unicode arrow in log

Use a single unicode right arrow instead of the two char ASCII right
arrow to separate the metadata from the actual log message. This is just
a preference decision and has no functional background.

Sources/Logging OSLog/Logging OSLog.swift

@@ -81,7 +81,7 @@ public struct LoggingOSLog: LogHandler {
 		let metadataCSV = Self.joinedMetadata(self.metadata, self.metadataProvider?.get(), metadata)
 		let messageParts = [message.description, metadataCSV]
 
-		let message = messageParts.compactMap { $0 }.joined(separator: " -> ")
+		let message = messageParts.compactMap { $0 }.joined(separator: " → ")
 		self.oslogger.log(level: OSLogType.from(loggerLevel: level), "\(message, privacy: .public)")
 	}