fix: fix useMultibandTrackVolume not using band count option passed on iOS (#209)

Co-authored-by: SaiChand440 <[email protected]>

Author: SaiChand-Headout

ios/LiveKitReactNativeModule.swift

@@ -198,7 +198,7 @@ public class LivekitReactNativeModule: RCTEventEmitter {
 
     @objc(createMultibandVolumeProcessor:pcId:trackId:)
     public func createMultibandVolumeProcessor(_ options: NSDictionary, pcId: NSNumber, trackId: String) -> String {
-        let bands = (options["bands"] as? NSString)?.integerValue ?? 5
+        let bands = (options["bands"] as? NSNumber)?.intValue ?? 5
         let minFrequency = (options["minFrequency"] as? NSString)?.floatValue ?? 1000
         let maxFrequency = (options["maxFrequency"] as? NSString)?.floatValue ?? 8000
         let intervalMs = (options["updateInterval"] as? NSString)?.floatValue ?? 40