Fixed typo in the README.md

I just found a single wrong typo, and I couldn't just pass by

Author: JUSTIVE

README.md

@@ -197,7 +197,7 @@ According to the demos above, here are lists of approximate statistics:
 | Prop          | Type                | Required | Description                                                                                                                                                                                                                                                                               |
 |---------------|---------------------|----------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
 | size          | Number              | ✓        | Each list item height, in variable height, this prop just use to calculate the virtual-list outside container viewport fixed height.                                                                                                                                                      |
-| remain        | Number              | ✓        | How many items should be shown in virtual-list viewport, so `size` and `remain` determine the outside container viewport height (`size × remian`).                                                                                                                                        |
+| remain        | Number              | ✓        | How many items should be shown in virtual-list viewport, so `size` and `remain` determine the outside container viewport height (`size × remain`).                                                                                                                                        |
 
 > Props of performance: