chore: fix deprecation

Signed-off-by: xsahil03x <xdsahil@gmail.com>

packages/stream_chat_flutter/lib/src/attachment/handler/stream_attachment_handler_io.dart

@@ -29,14 +29,16 @@ class StreamAttachmentHandlerDesktop extends StreamAttachmentHandler {
       options: options,
     );
 
-    // Open the native file browser so the user can select the download path.
-    final path = await getSavePath(suggestedName: data.fileName);
-
-    if (path == null) {
+    // Open the native file browser so the user can select the save location.
+    final saveLocation = await getSaveLocation(suggestedName: data.fileName);
+    if (saveLocation == null) {
       // Operation was canceled by the user.
       return null;
     }
 
+    // Get the path to the user's selected location.
+    final path = saveLocation.path;
+
     // Create an XFile for proper file saving.
     final file = data.toXFile(path: path);