fix(deps): patch flatted prototype pollution via npm audit fix

[yhabib]

Motivation

# npm audit report

flatted  <=3.4.1
Severity: high
Prototype Pollution via parse() in NodeJS flatted - https://github.com/advisories/GHSA-rf6f-7fwh-wjgh
fix available via `npm audit fix`
node_modules/flatted

1 high severity vulnerability

To address all issues, run:
  npm audit fix

Changes

• Ran npm audit fix

Tests

• CI is green

Todos

• Accessibility (a11y) – any impact?
• Changelog – is it needed?