Move old version documentation to docs section in readme

README.md

@@ -30,12 +30,6 @@ npm i @material-ui/pickers
 yarn add @material-ui/pickers
 ```
 
-Old versions documentation: 
-
-| Version   | Documentation url |
-| --------- | ------- |
-| v2 | https://material-ui-pickers-v2.dmtr-kovalenko.now.sh/ |
-
 Now choose the library that pickers will use to work with date. We are providing interfaces for [moment](https://momentjs.com/), [luxon](https://moment.github.io/luxon/), [dayjs](https://github.com/iamkun/dayjs) and [date-fns v2](https://date-fns.org/). If you are not using moment in the project (or dont have it in the bundle already) we suggest using date-fns or luxon, because they are much lighter and will be correctly tree-shaked from the bundle. Note, that we are fully relying on [date-io](https://github.com/dmtrKovalenko/date-io) for supporting different libraries.
 
 ```sh
@@ -71,6 +65,12 @@ render(<App />, document.querySelector('#app'));
 
 Check out the [documentation website](https://material-ui-pickers.dev/)
 
+Old versions documentation:
+
+| Version | Documentation url                                     |
+| ------- | ----------------------------------------------------- |
+| v2      | https://material-ui-pickers-v2.dmtr-kovalenko.now.sh/ |
+
 ### Recently updated?
 
 Changelog available [here](https://github.com/mui-org/material-ui-pickers/releases)