Incorrect generation of Roboto Flex font URLs

[Cognizaunce]

When using the Roboto Flex font family, font requests fail because the generated URLs use PascalCase paths, while the actual files in the theme are named in kebab-case. This results in 500 errors when trying to load the fonts.

Example:
Generated URL (failing):

https://mysite/wp-content/themes/extendable/assets/fonts/RobotoFlex/RobotoFlex-VariableFont_GRAD,XTRA,YOPQ,YTAS,YTDE,YTFI,YTLC,YTUC,opsz,slnt,wdth,wght.woff2

Actual file on disk (working):

https://mysite/wp-content/themes/extendable/assets/fonts/roboto-flex/roboto-flex.woff2

Impact:
The Roboto Flex font does not load, and text falls back to system fonts.

Notes:
Possibly related to commit 25a96e8.