fix(deps): patch flatted prototype pollution via npm audit fix (#7789)

# Motivation

```
# npm audit report

flatted  <=3.4.1
Severity: high
Prototype Pollution via parse() in NodeJS flatted - 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

- [x] Accessibility (a11y) – any impact?
- [x] Changelog – is it needed?

Author: yhabib