[graphiql] Postcss warning coming from Monaco editor - already fixed on their side

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Current Behavior

I'm using postcss and there's a warning linked to monaco-editor style:
(1:846) autoprefixer: end value has mixed support, consider using flex-end instead
@ ./node_modules/monaco-editor/esm/vs/editor/contrib/hover/browser/hover.css
@ ./node_modules/monaco-editor/esm/vs/editor/contrib/hover/browser/hoverContribution.js 14:0-21
@ ./node_modules/monaco-editor/esm/vs/editor/editor.all.js

This issue has been fixed on their side even if the ticket is still in open as you can see in last comment of the ticket:
https://github.com/microsoft/monaco-editor/issues/4823

Can you please update to latest version of monaco-editor ?

Regards,

### Expected Behavior

No warning while processing css with postcss.

### Steps To Reproduce

1. Use postcss while compiling your project
2. Build your application
3. A warning is thrown

### Environment

* GraphiQL Version:
* OS:
* Browser:
* Bundler:
* `react` Version:
* `graphql` Version:

### Anything else?

* GraphiQL Version: 5.2.2
* OS: Linux
* Browser: N/A
* Bundler: webpack + postcss
* `react` Version: 18
* `graphql` Version: 15.5.1