[core] Pass CII-Best-Practices badge

### Summary

Solve https://github.com/mui/pigment-css/security/code-scanning/3

There is an ongoing application with https://www.bestpractices.dev/en/projects/9161

<img width="1170" alt="SCR-20240626-owuu" src="https://github.com/mui/pigment-css/assets/3165635/2851e15f-3fb6-4408-9c1f-5d3b8cde4f51">




### Examples

_No response_

### Motivation

_No response_

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