[BUG]: wrong header name for `@stdlib/math/base/special/fast/pow-int`

[officiallyanee]

Description

The file basename is pow.h instead of pow_int.h , it should match it's package name but in snakecase, rather than kebabcase.

Environments

N/A

Checklist

• Read and understood the Code of Conduct.
• Searched for existing issues and pull requests.