Fix hydration error

[istarkov]

Description

Fixes this on each start

react_devtools_backend_compact.js:2367 Warning: Prop `className` did not match. Server: "c-dKXKjp c-gcikI language-css" Client: "c-dKXKjp c-gcikI"
    at pre
    at div
    at div

Looks like a bug with pre and code element combination in react hydration

Steps for reproduction

1. click button
2. expect xyz

Code Review

• hi @kof, I need you to do
  • conceptual review (architecture, feature-correctness)
  • detailed review (read every line)
  • test it on preview

Before requesting a review

• made a self-review
• added inline comments where things may be not obvious (the "why", not "what")

Before merging

• tested locally and on preview environment (preview dev login: 5de6)
• updated test cases document
• added tests
• if any new env variables are added, added them to .env.example and the builder/env-check.js if mandatory

[vercel]

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Name	Status	Preview	Updated (UTC)
webstudio-builder	✅ Ready (Inspect)	Visit Preview	Jun 14, 2023 8:14pm