Plugin resolving drawio in codeblock

[Ujifman]

I've made an instruction for collegues: how to embed draw.io scheme in markdown file. There is a codeblock with an exmaple like this:

```markdown
![some text of image](./some.assets/scheme.drawio)

So one expects that this codeblock will not be resolved. But plugin try to resolve it, that leads to building break.
![image](https://user-images.githubusercontent.com/34909951/208873702-23db94ce-5771-43ad-9942-15ff0484c4d7.png)