Fixed a couple of build errors

SessionMessagingKit/Database/Migrations/_003_YDBToGRDBMigration.swift

@@ -1315,7 +1315,7 @@ enum _003_YDBToGRDBMigration: Migration {
                 }
                 guard processedAttachmentIds.contains(legacyJob.attachmentID) else {
                     SNLog("[Migration Error] attachmentDownload job unable to find attachment")
-                    throw GRDBStorageError.migrationFailed
+                    throw StorageError.migrationFailed
                 }
                 
                 _ = try Job(

SessionMessagingKit/Sending & Receiving/MessageSender.swift

@@ -681,7 +681,7 @@ public final class MessageSender {
 public class SMKMessageSender: NSObject {
     @objc(leaveClosedGroupWithPublicKey:)
     public static func objc_leave(_ groupPublicKey: String) -> AnyPromise {
-        let promise = GRDBStorage.shared.write { db in
+        let promise = GRDBStorage.shared.writeAsync { db in
             try MessageSender.leave(db, groupPublicKey: groupPublicKey)
         }