[Bug] Table with heading slices first two rows

Editor version: 2.25.0
Editor Table version: 2.0.2

When I create a table without a header and save it, all the json data is fine.
But in the case of a header, the first two lines are sliced.

### Save method

`interface IEditorCore extends EditorJS {
destroy(): Promise,
clear(): Promise,
save(): Promise,
render(data: OutputData): Promise
}`
`
const editorCore = useRef()
`
`
const handleInitialize = useCallback((instance: IEditorCore) => {
editorCore.current = instance
}, [])
`
`
await editorCore.current.save()
`

### Without heading


### With heading