Update contextmenu-types.md

Author: huangshuwei

examples/src/docs/en/ve-table/contextmenu/contextmenu-types.md

@@ -10,8 +10,8 @@ header contextmenus
 | Cut                          | `CUT`                          |
 | Copy                         | `COPY`                         |
 | Empty column                 | `EMPTY_COLUMN`                 |
-| left fixed column to         | `LEFT_FIXED_COLUMN_TO`         |
-| right fixed column to        | `RIGHT_FIXED_COLUMN_TO`        |
+| Left fixed column to         | `LEFT_FIXED_COLUMN_TO`         |
+| Right fixed column to        | `RIGHT_FIXED_COLUMN_TO`        |
 | Cancel left fixed column to  | `CANCEL_LEFT_FIXED_COLUMN_TO`  |
 | Cancel right fixed column to | `CANCEL_RIGHT_FIXED_COLUMN_TO` |