[Bug] Block Tutorial, stretchBlock Deprecated

The tutorial appears broken in multiple places, this issue specifically about `block stretching`.

## Steps to reproduce:

https://editorjs.io/access-api

1. Do the Block Tutorial (creating SimpleImage) up to Chapter about `API`
2. Add a Image Block
3. Paste an Image URL into the entry
4. Enable the "stretch" tune

## Expected behavior:

The tutorial shouldn't lead me into a brick wall (deprecation.)

## Result:

[ It works, but a deprecation warning is thrown. ]

```
«blocks.stretchBlock()» is deprecated and will be removed in the next major release. Please use the «BlockAPI» instead.
```

## Device, Browser, OS:

- Firefox 98.0.2 (64-bit)
- Fedora Workstation 35 (Linux)

## Editor.js version:

`2.24.1` according to `save` output.

## Plugins you use with their versions:

**Not Applicable**