formatNumber Cast currency value to float

[MrYoloPotato]

Checklist before requesting a review

Please delete options that are not relevant.

• 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

• It fixes the issue of "Argument 2 ($amount) must be of type float, string given" when printing to PDF with the "Management" option checked
• It just casts the $value to float