Markdown linter and resized images

### Is this a hackmd.io issue?

- [x] Yes, the bug happens on https://hackmd.io
- [ ] No. If it's a self-hosted CodiMD instance, please fire up the issue in the repo of CodiMD: https://github.com/hackmdio/codimd

### What's the problem

Markdown linter marks the resized images as not properly written.
If I take the [official example](https://hackmd.io/@docs/insert-image-in-team-note#Specify-proportion):

```markdown
For example：
```

I'm getting the [MD034](https://github.com/DavidAnson/markdownlint/blob/main/doc/md034.md) issue visible in the GUI.

#### Current behaviour


Provide steps to reproduce:

1. Write the following text:

```markdown
```

2. Turn on the "linter"

#### Expected behaviour

No linter issues in proper Markdown code?
Is `` the proper Markdown code?

i saw the following syntax for making images smaller:

```
{:width="600"}
````

... which looks like "valid" markdown ...

#### Environment

I use HackMD on:

**Desktop**
- Browser: Chromne
- Browser Version: 131.0.6778.108