Update README.md

Updates click event call order

file_picker_web/README.md

@@ -26,4 +26,4 @@ dependencies:
 Once you have the `file_picker_web` dependency in your pubspec, you should
 be able to use `package:file_picker` as normal.
 
-[1]: ../file_picker/file_picker
+[1]: ../file_picker

file_picker_web/lib/file_picker_web.dart

@@ -46,9 +46,9 @@ class FilePicker extends FilePickerPlatform {
     html.InputElement uploadInput = html.FileUploadInputElement();
     uploadInput.multiple = allowMultiple;
     uploadInput.accept = _fileType(type, allowedExtensions);
-    uploadInput.click();
     uploadInput.onChange
         .listen((event) => pickedFiles.complete(uploadInput.files));
+    uploadInput.click();
     return await pickedFiles.future;
   }