FIX / (Rector) cast $value to string in preg_match_all call

[Mary-Clb]

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• Rector was flagging a CI error because the preg_match_all argument $value could be of several types, so a (string) cast was added to ensure strict type compliance.