Fix Recognize Text action accessing view context MO off of main thread

Closes #393

Packages/ComposeUI/Sources/ComposeUI/Controllers/AttachmentRowController.swift

@@ -70,8 +70,8 @@ class AttachmentRowController: ViewController {
     private func recognizeText() {
         descriptionMode = .recognizingText
         
-        DispatchQueue.global(qos: .userInitiated).async {
         self.attachment.getData(features: self.parent.mastodonController.instanceFeatures, skipAllConversion: true) { result in
+            DispatchQueue.main.async {
                 let data: Data
                 switch result {
                 case .success((let d, _)):