fix(ui): Adjust code snippet styling to prevent overflow issue

[dedyf5]

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Description

This PR addresses the issue where several code snippets on the 'Getting Started' page overflow their containers, causing them to extend beyond the main content area and overlap with the sidebar. The fix involves adjusting the CSS styling for code blocks. This ensures that all affected code snippets on this page are properly contained.

Screenshots:
Before:

After:

Issue reference

Fixes: #1488